Topical authority is the credibility your website builds around a specific subject area, based on how thoroughly and consistently you cover that topic. Instead of relying on a single page to rank, topical authority comes from publishing a connected set of high quality content that answers the key questions people have, from broad overviews to detailed subtopics. When your site demonstrates deep expertise and helpful coverage, search engines are more likely to see it as a strong match for related queries.
The fastest way to build topical authority is to organize content around clear themes and make it easy to navigate. Create a strong core page for the main topic, support it with accurate, well researched articles, and link them together so relationships are obvious. Keep facts up to date, avoid thin or repetitive pages, and be precise with definitions and examples so readers can trust what they are learning. Over time, that combination of clarity, completeness, and consistency can improve rankings across an entire topic, not just one keyword.