The depth and breadth of a website's coverage on a single topic, measured by search engines and AI systems through internal linking, content volume, and citation patterns.
A site that publishes one article on AEO has weak topical authority. A site with 50 interconnected articles, a glossary, comparison pages, and original research has strong topical authority. AI engines prefer to cite sites with topical authority because they are statistically more likely to be correct.
Build topical authority by mapping your category into a content cluster (pillar page + supporting articles + glossary terms + tools), interlinking aggressively, and updating content every 90 days.
VibecodeAEO scans your site for all AEO factors weekly and tells you exactly what to fix.