SEO Glossary: 320+ Key Terms Explained One by One

New to SEO? This glossary breaks down the most important terms and acronyms—like SEO, CRO, PPC, and CMS—so you can understand and navigate the world of search with confidence.

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410 Gone

410 Gone is an HTTP status code that tells browsers and search engines a page was deleted on purpose and will not come back.

404 Error

A 404 error is a Not Found message that shows when a page is missing, and fixing it helps visitors and search engines reach the right content.

304 Not Modified

304 Not Modified is a web status code that tells the browser a page has not changed, so it can safely use its saved copy to load faster.

302 Redirect

A 302 redirect is a way to send people and search engines from one web page to another for a short time without changing the original page address.

301 Redirect

A 301 redirect is a permanent way to send people and search engines from one web page address to a new one without losing traffic or SEO value.

10x Content

10x content is online content that is ten times more helpful, clear, and interesting than anything else that already exists on the same topic.

A

Auto-Generated Content

Auto generated content is text, images or videos made by software or AI tools, not typed by a person, and it can help or hurt your website if used wrongly.

Authority

Authority in SEO is how much people and search engines trust a website or page, which helps it rank higher and get more visitors.

Artificial intelligence

Artificial intelligence is when computers and machines learn to think, decide and solve problems in smart ways that usually need human brains.

Article Syndication

Article syndication means sharing the same article on many websites so more people can read it and visit your site.

Article Spinning

Article spinning means taking one article and changing words to make many new versions, usually to trick search engines, but it often hurts quality and SEO.

Anchor text

Anchor text is the clickable words in a link that tell people and search engines what the linked page is about.

Analytics

Analytics means using data and numbers to understand what is happening so you can make smarter decisions and improve results.

Alt text

Alt text is a short written description of an image that helps people and search engines understand what the picture shows.

Algorithm

An algorithm is a clear list of steps that tells a computer or person exactly how to solve a problem or finish a task in the right order.

AhrefsBot

AhrefsBot is a computer program that visits web pages and collects data so Ahrefs can show SEO tools and reports about your website.

ADA Website Compliance

ADA website compliance means making your site easy to use for people with disabilities so everyone can read, watch, buy, or contact you online.

Ad Impressions

Ad impressions show how many times an online ad is loaded on a screen, helping you measure how many people might have seen your message.

Accelerated Mobile Pages (AMP)

Accelerated Mobile Pages AMP is a way to build very fast loading web pages for phones so visitors enjoy quick and smooth reading.

Absolute URL

An absolute URL is a full web address that shows the exact location of a page or file on the internet so people and search engines can reach it.

Above the fold

Above the fold is the part of a web page you see first without scrolling, so it is key for grabbing attention fast.

A/B testing

A B testing is a way to compare two versions of something to see which one works better so you can make smarter choices.

B

Broken link

A broken link is a web link that does not work anymore, so visitors see an error page instead of the content they expected.

Bridge Page

A bridge page is a simple web page that warms up visitors then sends them to another page, often used in SEO, ads and sales funnels.

Breadcrumb navigation

Breadcrumb navigation is a row of links that shows where you are on a website and lets you click back to earlier pages fast.

Branded keyword

A branded keyword is a word or phrase that includes your brand name and helps people find your business when they already know or recognize you.

Branded Content

Branded content is useful or entertaining content created by a brand that feels like a story, not a pushy ad, so people actually want to watch or read it.

Brand

A brand is how people see and remember a business or person, and it helps them decide if they trust, like, and want to buy from them.

Bounce rate

Bounce rate shows how many visitors leave your website after viewing just one page, and it helps you understand if your content is interesting and useful.

Bot

A bot is a computer program that does tasks automatically, often on the internet, to help with jobs like searching, chatting or checking websites.

Blog

A blog is a type of website where people regularly post articles, stories, or updates to share ideas, teach others, and attract readers or customers online.

Black Hat SEO

Black hat SEO uses trick methods to get higher Google rankings fast but it breaks search rules and can cause big penalties.

Bingbot

Bingbot is the computer program that Bing uses to find, read, and save web pages so they can appear in Bing search results.

Bing Webmaster Tools

Bing Webmaster Tools is a free Microsoft tool that shows how your website appears in Bing search and helps you fix problems to get more visitors.

Bing

Bing is a web search engine from Microsoft that helps you quickly find websites, images, videos and news on the internet.

Backlink analysis

Backlink analysis is the study of all websites that link to your site so you can improve search rankings and trust.

Backlink

A backlink is a link from another website to your site, and it helps search engines see your pages as more trusted and important.

B2C SEO

B2C SEO is how a business gets more shoppers from Google search by making its website easy to find, easy to read and trusted by everyday people.

B2B SEO

B2B SEO is search engine optimization that helps companies sell to other businesses by making their website easy to find on Google and other search engines.

C

Customer Journey

Customer journey is the full path a person takes from first hearing about a brand to buying and using a product, so businesses can improve every step.

Crawling

Crawling is how search engine bots travel across web pages, read their content, and discover new links so pages can later appear in search results.

Crawler

A crawler is a computer program that visits web pages and collects information so search engines can find, understand, and list websites in search results.

Crawlability

Crawlability is how easily search engines can visit and read your website pages so they can show your content in search results.

Crawl error

A crawl error happens when a search engine bot tries to visit a page on your site but cannot reach it or read it correctly.

Crawl budget

Crawl budget is the amount of attention search engine bots give your site which affects how many pages they visit and keep updated in search results.

Cornerstone Content

Cornerstone content is the most important and helpful pages on your site that cover a topic in depth and help visitors and search engines understand what you are about.

Core Web Vitals

Core Web Vitals are three Google speed and stability scores that show how fast and smooth a page feels to visitors and help your site rank better in search.

Cookie

A cookie is a small text file that websites save in your browser to remember things about you, like your login or what is in your shopping cart.

Conversion rate optimization

Conversion rate optimization is the way you improve a website so more visitors do what you want, like buy, sign up or contact you.

Conversion rate

Conversion rate shows what percent of visitors do an important action, like buying or signing up, so you can measure how well your website or marketing turns visits into results.

Conversion

Conversion is when a visitor does what you want, like buying, signing up or clicking, and it shows how well your website or marketing turns visitors into results.

Content Relevance

Content relevance means how well a page matches what a person is searching for so search engines can show the most useful and correct information.

Content Quality

Content quality means how good, useful, and trustworthy your text, images, or videos are for real people and for search engines.

Content marketing

Content marketing is when a business shares helpful stories, articles, or videos to attract people, build trust, and gently guide them to become customers.

Content management system

A content management system is software that lets you create, edit, and publish a website easily without needing to write code.

Content Hub

A content hub is a main page that links to many related articles on one topic so people and search engines can find everything easily in one place.

Content Gap Analysis

Content gap analysis is a way to find missing topics on your website so you can create better pages that match what people search for online.

Content Delivery Network (CDN)

A content delivery network CDN is a group of servers that work together to load websites, videos, and files faster and safer for people around the world.

Content

Content is any information you create to share your message online or offline so people can learn, enjoy, and take action.

Computer-Generated Content

Computer generated content is text, images or other media created by software or AI instead of being written or drawn directly by a person.

Competition

Competition means different people or businesses trying to win the same goal, customers, prize or place.

Co-occurrence

Co occurrence is when two words or ideas often appear together in text and help search engines understand what a page is really about.

Co-citation

Co citation is when two different websites are mentioned or linked on the same page, which helps search engines see a connection between them.

Cloaking

Cloaking is a trick where a website secretly shows one version to search engines and a different version to real people to cheat rankings.

Click-through rate

Click through rate shows how many people click your link after seeing it, so you can quickly tell if your title and message are working well.

Click depth

Click depth shows how many clicks it takes to move from your homepage to any other page, and it helps you check if your site is easy to explore.

Citation

A citation is a mention of a source or business that gives credit, proves facts, and helps people and search engines trust what they read.

Cart abandon rate

Cart abandon rate shows how many shoppers put items in their online cart but leave without buying, so stores can see and fix problems in the checkout process.

Canonical URL

A canonical URL is the main web page address you choose so search engines know which page to show and rank when you have similar or duplicate pages.

Canonical Tag

A canonical tag is a small piece of code that tells search engines which page is the main version, so your site avoids duplicate content problems and ranks better.

Cached page

A cached page is a saved copy of a web page that loads faster and lets you see older versions even when the live site is slow or has changed.

Cache

Cache is a small, fast storage that keeps copies of data so your apps and websites load quicker and use less internet.

D

Dynamic URL

A dynamic URL is a web address that changes based on user choices or data, which can affect how search engines crawl and rank a website.

Dynamic content

Dynamic content is website or app content that changes automatically for each visitor so people see more useful and personal information.

Dwell time

Dwell time is how long someone stays on a page after clicking a search result, which helps show how useful and interesting that page is.

Duplicate content

Duplicate content is when the same or very similar text appears on more than one web page, and fixing it helps your site rank better in search results.

Doorway Page

A doorway page is a web page made only to catch search traffic and push people to another page, which can hurt your rankings and upset visitors.

Domain Structure

Domain structure is the way your website name and its parts are arranged to keep pages clear, easy to find, and trusted by users and search engines.

Domain Rating (DR)

Domain Rating or DR is a number from 0 to 100 that shows how strong and trusted a website looks based on its backlinks.

Domain authority

Domain authority is a score that shows how strong and trusted a website is, and helps predict how well its pages can rank in search results.

Domain

A domain is the main part of a website address that people type in a browser to visit your site and find you online.

Dofollow Link

A dofollow link is a normal clickable link that tells search engines to trust and count it, which can help a page rank higher in search results.

Do-follow

Do-follow is a type of link that tells search engines to follow it and pass SEO power to the page it points to.

Disavow

Disavow means asking Google to ignore certain backlinks so bad links do not hurt your website ranking.

Direct traffic

Direct traffic means people visit your website by going straight to it instead of clicking from another site, which helps you see who comes on purpose.

Demographics

Demographics are facts about groups of people, like age or income, that help businesses and governments understand and serve them better.

De-index

De index means a web page is removed from a search engine list so it no longer shows in search results.

E

External link

An external link is a clickable text or image on a website that sends you to a different website, helping people discover more useful information.

Exit rate

Exit rate shows how often people leave your website from a certain page, so you can see which pages make visitors stop and go away.

Evergreen Content

Evergreen content is information that stays useful and helpful for a long time so people can keep reading and learning from it again and again.

Entry Page

An entry page is the first page a visitor sees on your website, and it shows how people find and start using your site.

Entity-Based SEO

Entity-based SEO is a way to help search engines understand real people, places, things, and ideas so your content can rank better and answer questions more clearly.

Enterprise SEO

Enterprise SEO is search engine optimization for very large websites so big brands can get more traffic, sales, and leads from Google and other search engines.

Engagement metrics

Engagement metrics are numbers that show how people interact with your website, app, or content so you can see what users like and improve their experience.

Email Outreach

Email outreach is when you send emails to new or existing contacts to build relationships, share value, and reach goals like sales, backlinks, or partnerships.

Ego Bait

Ego bait is content that praises or highlights a person so they feel proud and are more likely to share or link to that content.

Editorial Link

An editorial link is a natural link from another website that you earn because your content is helpful, trusted and worth sharing.

Ecommerce SEO

Ecommerce SEO is the way online shops get more free visitors from search engines by making product pages easy to find, easy to read, and easy to trust.

Ecommerce

Ecommerce is buying and selling things on the internet, helping people and businesses shop and trade online without going to a physical store.

Earned media

Earned media is free attention your brand gets when other people talk about you online or offline, which can grow trust, traffic, and sales.

E-E-A-T

E E A T is how Google checks if online content is helpful, safe and written by people who know and understand the topic.

F

Freshness

Freshness in SEO means how new or recently updated a page is and it helps search engines show the best and most current answers.

Findability

Findability means how easy it is for people to find what they are looking for on a website, app, or search engine so they get answers fast.

Featured snippet

A featured snippet is a short answer box at the top of Google search that quickly shows the best answer to a user question.

Faceted Navigation

Faceted navigation lets people filter and sort items on a website so they can quickly find what they want while you control how search engines crawl those pages.

G

Guestographic

A guestographic is an infographic you create and share on other websites to earn backlinks, grow traffic, and build your brand.

Guest blogging

Guest blogging is when you write an article for someone else’s website to share your ideas, reach new readers, and earn trusted links back to your own site.

Grey Hat SEO

Grey hat SEO uses risky search tricks that are not clearly allowed or banned, to grow traffic faster, but it can cause penalties or loss of rankings.

Googlebot

Googlebot is Googles web crawler that visits websites, reads their pages, and sends this information back so Google Search can show those pages to people.

Google Webmaster Tools

Google Webmaster Tools was Googles free tool that helped website owners see and fix search and indexing problems on their sites.

Google Webmaster Guidelines

Google Webmaster Guidelines are Google rules that show website owners how to build safe, useful pages that can appear in Google Search results.

Google Trends

Google Trends is a free Google tool that shows how often people search for words over time, so you can spot trends and plan better content or products.

Google Top Heavy Update

Google Top Heavy Update is a Google rule that lowers rankings for pages with too many ads at the top, so users see real content first.

Google Search Quality Rater Guidelines

Google Search Quality Rater Guidelines are rules that help human testers judge if Google search results are helpful, safe, and trustworthy for real people.

Google Search Console

Google Search Console is a free Google tool that helps you see how your website appears in Google Search and fix problems to get more visitors.

Google Sandbox

Google Sandbox is an unconfirmed filter that may hold back new websites from ranking well at first, so Google can check quality and trust.

Google RankBrain

Google RankBrain is an AI system that helps Google understand search questions better so it can show more accurate, helpful results.

Google Pigeon

Google Pigeon is a Google update that changed local search results so people see more accurate nearby businesses when they search.

Google Penguin

Google Penguin is a Google search update that looks for fake or spammy links, then lowers or ignores them so more honest and helpful websites can rank higher.

Google Penalty

A Google penalty is when Google lowers or removes your site from search results because it breaks Google rules, which can quickly cut your traffic and visitors.

Google penalties

Google penalties are actions that hurt your website visibility in Google when you break search rules, and fixing them helps restore traffic.

Google partner

A Google Partner is a trusted company that passed Google Ads tests and meets performance rules so it can help businesses run better online ad campaigns.

Google Panda

Google Panda is a Google search update that lowers low quality pages and rewards helpful content so better pages show higher in search results.

Google Knowledge Panel

A Google Knowledge Panel is a special information box that shows key facts about a person, place, brand or thing on the right side of Google search results.

Google Knowledge Graph

Google Knowledge Graph is a big database that helps Google understand people, places, and things so it can show richer, smarter search results.

Google Hummingbird

Google Hummingbird is a big Google search update that helps the search engine better understand full questions so it can show more accurate and helpful results.

Google Dance

Google Dance is a time when Google search results move up and down a lot while Google updates its index and ranking system.

Google Caffeine

Google Caffeine is a faster search index that helps Google find, store, and show fresh web pages more quickly for users and website owners.

Google Business Profile

A Google Business Profile is a free online listing that helps people find and contact your local business on Google Search and Google Maps.

Google Bombing

Google bombing is a trick where many sites use the same link text to push a page to the top of Google for a joke or harmful search phrase.

Google Autocomplete

Google Autocomplete is a feature that shows search ideas as you type, helping people find answers faster and helping creators see what users are really looking for.

Google Analytics

Google Analytics is a free Google tool that shows who visits your website, what they do, and how you can improve your site.

Google Algorithm

The Google algorithm is the set of rules Google uses to choose which pages to show first in search results so people can quickly find the most helpful information.

Google Alerts

Google Alerts is a free tool that sends you email updates when new content appears online for topics or keywords you choose.

Google

Google is a large technology company best known for its search engine that helps people quickly find information, websites, images, and videos on the internet.

Geotargeting

Geotargeting is when websites or ads change what you see based on your location so you get more useful and local information.

Gateway Page

A gateway page is a low quality web page made mainly to rank on search engines and then push visitors to another page or website.

Gated Content

Gated content is online material that people can only see after they share something, like an email address, which helps businesses get leads and learn about visitors.

H

Web Hosting

Web hosting is a service that stores your website files on a special computer so people can visit your site anytime from anywhere.

HTTPS

HTTPS is a way for websites to send and receive data safely so no one can easily see or change what you do online.

HTTP 200 Response Code

HTTP 200 response code tells browsers and search engines that a web page loaded correctly and the request was successful.

HTTP

HTTP is a simple set of rules that lets your web browser and websites talk to each other and share information safely and quickly.

HTML

HTML is the basic code that builds web pages, telling your browser what to show so text, images and links appear in the right place.

Hreflang

Hreflang is a special code that tells search engines which language and country version of a page to show to each user.

Homepage

A homepage is the main opening page of a website that welcomes visitors and helps them find important information quickly.

Holistic SEO

Holistic SEO means improving a website in every way so people and search engines both like it, not just using tricks to get a quick ranking jump.

Hilltop Algorithm

Hilltop Algorithm helps search engines find expert websites on a topic so users get more trusted, relevant results and site owners know why quality links from expert pages matter.

Headline

A headline is the main title of a page or article that grabs attention and tells people and search engines what the content is about in a quick and clear way.

Heading

A heading is a short title at the top of a page or section that tells people and search engines what that part of the content is about.

Header Tags

Header tags are HTML labels that show search engines and readers which parts of a page are main titles and which parts are subheadings.

H1 tag

An H1 tag is the main title of a web page that helps visitors and search engines quickly understand what the page is about.

I

Interstitial ad

An interstitial ad is a full screen ad that appears between content and can help websites and apps earn money when users move from one page or screen to another.

Internal link

An internal link is a clickable word or image on a website that sends you to another page on the same website, helping people and search engines move around easily.

Intent

Intent is the real goal or purpose behind what someone does, says, or searches online, and it helps match people with the right information or action.

Informational Query

An informational query is a search done to learn something, not to buy or download, and it helps websites create helpful content that answers real questions.

Information architecture

Information architecture is the way content is planned, grouped and labeled so people can quickly find what they need on a website, app or any information system.

Infographic

An infographic is a picture that mixes text, numbers, and icons to explain information in a clear and quick way.

Indexing

Indexing is when a search engine saves and organizes your web pages so they can show up in search results and bring you visitors.

Indexed page

An indexed page is a web page that a search engine has saved so people can find it in search results.

Indexability

Indexability shows if a search engine can save and show your web page in search results, which helps people find your site.

Index Bloat

Index bloat is when search engines store too many useless pages from a site, which can waste crawl budget and hurt important pages in search.

Inbound marketing

Inbound marketing is a way to attract customers by sharing helpful content so people come to you instead of you chasing them.

Inbound link

An inbound link is a link from another website to your site, helping people and search engines find and trust your pages.

Image compression

Image compression makes picture files smaller so they load faster, use less data and still look good to people who view them.

J

JavaScript SEO

JavaScript SEO is the way you make web pages that use JavaScript easy for Google and other search engines to find, read, and show in search results.

K

KPI

A KPI is a simple number or measure that shows how well a person, team, or business is reaching an important goal.

Keyword stuffing

Keyword stuffing means using the same keyword too many times on a page, which can hurt your SEO and make your content hard to read.

Keyword Stemming

Keyword stemming is when search engines understand and match different word forms from the same root word so your page can show for more related searches.

Keyword research

Keyword research is finding the exact words people type into search engines so you can create content that matches what they need and brings them to your website.

Keyword Ranking

Keyword ranking is the position of a web page in search results for a specific word or phrase and it shows how easily people can find your site.

Keyword difficulty

Keyword difficulty is a score that tells you how hard it is to rank on Google for a specific search word or phrase.

Keyword density

Keyword density is the number of times a word or phrase appears in a page compared to the total words to help search engines understand the topic.

Keyword Clustering

Keyword clustering is the practice of grouping similar search keywords together to create better organized pages that match what people and search engines are looking for.

Keyword cannibalization

Keyword cannibalization happens when several pages on a site compete for the same keyword so Google gets confused and rankings suffer.

Keyword

A keyword is a word or short phrase people type into search engines to find information that helps websites match the right visitors.

L

LSI Keywords

LSI keywords are words and phrases that are closely related to your main keyword and help search engines understand the topic and meaning of your content better.

Log File Analysis

Log file analysis means reading website server logs to understand how users and search engines interact with your site so you can fix issues and grow traffic.

Local SEO

Local SEO helps your business show up in search results when nearby people look for products or services like yours.

Local Search Marketing

Local search marketing is how a business gets found by nearby customers on Google and other online tools so more people visit, call, and buy.

Local pack

A local pack is a box in Google search that shows nearby businesses on a map with key details to help people quickly choose where to visit or contact.

Local Citation

A local citation is any online mention of your business name, address and phone that helps people and search engines find and trust your local business.

Local Business Schema

Local Business Schema is a special code that helps search engines understand important details about a local company and show it better in local search results.

Link velocity

Link velocity is the speed at which a website gains new backlinks over time, and it helps search engines judge if growth looks natural or suspicious.

Link Text

Link text is the clickable words in a hyperlink that tell people and search engines what the linked page is about.

Link Spam

Link spam is when people create fake or low quality links just to trick search engines and rank higher, which can lead to penalties and lost traffic.

Link Scheme

A link scheme is a fake or unfair way to get backlinks just to trick search engines and boost rankings.

Link Rot

Link rot is when a link on a web page stops working, which makes it hard for people and search engines to find the right information.

Link Reclamation

Link reclamation is the process of finding and fixing missing or broken backlinks so you can regain lost SEO value and traffic.

Link profile

A link profile is the full list and quality of websites that link to your site, and it helps search engines judge how trustworthy and strong your site is.

Link Popularity

Link popularity is how many and how strong other websites links point to your site, which helps search engines decide how important and trustworthy your pages are.

Link Juice

Link juice is the SEO power that one page passes to another through hyperlinks to help pages rank higher in search engines.

Link farm

A link farm is a group of websites that only link to each other to trick search engines and can hurt your rankings.

Link Exchange

A link exchange is when two websites agree to link to each other to share visitors and improve search visibility.

Link equity

Link equity is the value and trust that a web page passes to another page through a link, helping pages rank higher in search results.

Link building

Link building is the process of getting other websites to link to yours so you can get more visitors and better positions in search results.

Link Bait

Link bait is content made to grab attention so that many other websites want to link to it.

Link

A link is a clickable part of a page that takes you to another page, file, or place and helps people and search engines move around the web.

Lead

A lead is a person or business that shows interest in your product or service and may become a customer in the future.

Latent Semantic Analysis (LSA)

Latent Semantic Analysis is a smart math method that finds hidden meanings and relationships between words and documents.

Landing page

A landing page is a single web page made to get visitors to do one clear action like sign up, buy, or click a button.

M

Mobile-friendly

Mobile friendly means a website is easy to read, click and use on a phone, which keeps visitors happy and helps the site rank better in Google.

Meta description

A meta description is a short text that tells people and search engines what a page is about and helps more people choose your page in search results.

N

NAP

NAP means Name, Address, Phone Number and it helps search engines and people find and trust your local business.

O

On-page SEO

On-page SEO means improving parts of a single web page so search engines understand it clearly and more people can find, read, and enjoy your content.

Off-page SEO

Off-page SEO means actions done outside your website, like getting links and mentions, to make your site more trusted and higher in search results.

P

Page speed

Page speed is how fast a web page shows on your screen, and it matters because faster pages keep visitors happy and help websites rank better in search results.

Q

Quality content

Quality content is helpful and clear information that answers real questions and makes life easier for the reader.

R

Robots.txt

Robots.txt is a simple text file that tells search engines which pages of a website they can visit and which pages they should avoid.

S

Structured data

Structured data is a special way of writing information on a webpage so search engines can understand it clearly and show richer results.

Sitemap

A sitemap is a simple file that lists all important pages on a website so search engines and people can find them quickly.

Semantic search

Semantic search is how search engines try to understand real meaning and intent in your words so they can show better and more helpful results.

Search Intent

Search intent is the real reason behind a search, and knowing it helps you create content that people and search engines both like.

Search Engine Results Pages (SERPs)

Search Engine Results Pages are the lists of links and answers you see after you search, they matter because they decide what information you notice and click first.

Search engine

A search engine is a website or app that helps you quickly find information, images, videos or products on the internet by matching your words to web pages.

U

V

W

Web Hosting

Web hosting is a service that stores your website files on a special computer so people can visit your site anytime from anywhere.