Optimization work done directly on a page’s content and HTML — title tags, headings, body copy, internal links, image alt text, and URL structure — as opposed to off-page factors like backlinks or technical/crawling factors at the site level. On-page SEO is the most controllable layer of SEO because it doesn’t depend on other sites linking to you or on infrastructure changes; it’s also foundational for AI search, since clear headings and direct answers are exactly what AI systems extract and cite. See the on-page SEO checklist.
Part of the Plain Intelligence glossary. See all terms.