HOW TO MEASURE YOUR SITE'S TOPICAL AUTHORITY

Summary from the TLDR Marketing newsletter

Topical authority is a site-level signal that can outweigh page quality in rankings. Google uses signals like siteFocusScore and siteRadius to evaluate how tightly a site's content clusters around a topic. Off-topic pages can weaken performance even if core pages are strong. Sites that stay tightly focused outperform those with drift because they present a clearer authority signal to ranking systems. It's important to audit all pages, identify outliers, and prune or redirect low-relevance content to improve focus and reduce drift. More content is not better, since unfocused expansion can dilute authority and hurt visibility.