SEO Glossary: 215+ Key Terms for 2025
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.
What Is Off-Page SEO?
Off-page SEO refers to actions taken outside your website—like earning backlinks—to improve its ranking in search engines. It helps build authority and trust for better visibility.
What Is On-Page SEO?
On-page SEO involves optimizing elements on your website—like content, titles, and meta tags—to improve search engine rankings and user experience.
What Are Backlinks?
Backlinks are links from other websites that point to your site. They help build authority and improve your search engine rankings.
What Is Organic SEO?
Organic SEO is the process of improving your website’s visibility in search engine results without paid ads. It focuses on quality content, keywords, and backlinks to drive long-term traffic.
What Is Keyword Stemming?
Keyword stemming is Google’s way of recognizing different forms of a word—like “run,” “running,” or “runner”—to better understand search intent and improve results.
What Is Thin Content?
Thin content refers to low-quality web pages with little to no value for users. It lacks depth, usefulness, and often hurts your site’s SEO.