Glossary /On-page & content
Topical Authority
An engine’s assessment that a site covers a subject comprehensively enough to be trusted on it, rather than ranking page by page.
Topical authority is the idea that engines evaluate a site’s standing on a subject, not only the merits of an individual page. A site with genuine depth on a topic tends to rank new pages on that topic faster and higher than a site publishing its first article on it, all else being equal.
It is built by covering a subject properly: the obvious questions and the awkward ones, linked together, updated when the facts change. It is not built by publishing volume — a hundred thin articles on a topic is evidence of a content mill, and engines have got good at recognising the pattern.
The strategic implication is to pick a narrower subject than feels comfortable and finish it, rather than to publish shallowly across everything a company might one day sell. Coverage that stops halfway reads as abandonment.