What Is Topical Authority? Covering a Subject in Depth

Topical authority is an SEO term for how thoroughly and credibly a site covers one subject. A site that answers the main questions on a topic, with pages that link together and show real expertise, gives readers and search engines more reason to trust it on that subject than a site with one page on it. Google doesn't use the phrase for regular web search, but its guidance points the same way. This explainer is part of our technical SEO guide.

What topical authority means

The idea is simple. When someone searches a question, search engines try to show sources that know the subject well. A site that has covered the topic from the basics to the specifics, and keeps that coverage accurate, is more likely to be one of those sources than a site that touched it once.

Depth is the key word. It means answering the questions people actually ask about a topic, one clear page per question, rather than one long page that tries to cover everything. It also means staying on subject. A site about roofing that also publishes recipes and celebrity news is not building depth in anything.

The term comes from the SEO industry, not from Google. There is no topical authority score you can look up. Some SEO tools show their own authority estimates, but Google says no third-party tool has access to its internal ranking systems. Treat those numbers as the tool's opinion.

What Google has said about topics and expertise

Google has published three things that bear on the idea. None of them is a promise about rankings, but together they describe what depth on a subject looks like.

The topic authority system is the closest match to the SEO term, but Google describes it as a news system. It helps decide which expert publications to show for news queries in areas such as health, politics or finance. Its signals include how notable a source is for a topic, how often its original reporting is cited by others, and its reputation.

The helpful content guidance applies to every site. It lists questions to ask about your own content. Two of them matter most here: does your site have a primary purpose or focus, and does your content show first-hand expertise and a depth of knowledge? It also names a warning sign: producing lots of content on many different topics in the hope that some of it performs well.

How a content hub shows depth

The most practical way to show depth is a hub. One overview page, the pillar, introduces the subject and links to every detailed page. Each detailed page, or spoke, answers one question in full, links back to the pillar and links across to its closest neighbours. Readers can start broad and go deep, and crawlers can find every page through links.

How you link the pages matters as much as which pages exist. Our guide to internal linking strategy covers anchor text, orphan pages and hub-and-spoke links in detail.

How to plan coverage of a topic

Start with the questions, not the page count. Run keyword research for the whole subject and group the keywords that share an intent. Each group becomes one page in your keyword map. If two groups want the same answer, merge them. If one group mixes two different needs, split it. Our explainer on search intent shows how to tell the difference.

Next, choose the pillar. It should cover the broad version of the topic and give a short answer to the main question, then hand readers to the detailed pages. Then order the spokes by how useful they are to your audience, starting with the questions your customers ask most often.

Finally, check each planned page against one test: could you add something a generic summary couldn't? That might be a worked example from your own work, a process you actually follow, or a mistake you see often. If you can't, the page may not be worth writing yet.

What topical authority is not

It isn't a page count. More pages don't mean more authority. Google's spam policies describe scaled content abuse as generating many pages mainly to manipulate rankings rather than help users, no matter how they are made. Writing a separate page for every small variation of a query falls into that trap.

It isn't a word count. Google says it has no preferred word count. A page should be as long as the question needs.

It isn't freshness theatre. Google's guidance lists changing the dates on pages that haven't really changed, and adding or removing content just to look fresh, as warning signs. Update a page when the facts change, and say what changed.

It isn't a quick win. Depth takes planning and steady publishing. Nobody can promise that covering a topic will produce a particular ranking.

How to tell whether your coverage is working

There is no single report for topical authority, but Search Console shows how a group of pages performs. In the Performance report, add a page filter for the folder your hub lives in, then look at the Queries tab. Over several months, a healthy hub tends to appear for a wider range of related queries, not just the exact keyword each page targets.

Also look for problems. If one query sends traffic to two different pages, they may be competing, and one may need merging or refocusing. If a spoke gets no impressions at all, check that it is indexed and well linked before you rewrite it. If you'd rather have topic planning and content handled for you, our in-house SEO team builds pages around real search intent.