SEO Glossary 2026 — Every SEO Term Explained
A complete glossary of SEO terms every marketer should know.
Above the Fold
Content visible on a webpage without scrolling.
Alt Text
Alternative text that describes an image for accessibility and SEO.
Anchor Text
The clickable text of a hyperlink.
Backlink
A link from one website to another.
Canonical Tag
An HTML element that specifies the preferred version of duplicate pages.
Crawling
The process by which search engines discover web pages.
Domain Authority
A score predicting how well a website will rank.
Index
The database where search engines store information about web pages.
Keyword
A word or phrase that users type into search engines.
Meta Description
A brief summary of a page's content displayed in search results.
On-Page SEO
Optimization of elements on your website.
Technical SEO
Optimization of website infrastructure.