Topical authority is the degree to which a website is recognised as a deep and reliable source on a particular subject. A site that covers one area thoroughly, accurately and from experience tends to be treated as more trustworthy on that area than a site that touches it once among hundreds of unrelated pages.
How topical authority works
Google does not publish a “topical authority” score, and it is not a single setting you can check. It is a useful name for an effect SEO practitioners observe: sites that focus on a subject, cover it in depth and connect their pages well tend to rank more easily for new pages within that subject. Google has used the phrase itself, describing a “topic authority” system for news in 2023 that helps identify publications with expertise in particular areas or places. Beyond news, the idea links to how Google understands entities and the relationships between topics.
Several things build it:
- Depth: answering the main questions in a subject, not just the popular one.
- Structure: organising pages into topic clusters so related pages link to each other with descriptive anchors.
- Accuracy and experience: content that shows first-hand knowledge, which connects to E-E-A-T.
- Recognition: links and mentions from other relevant sites in the same field.
- Focus: not diluting the site with content that has nothing to do with the business.
Why it matters
For a small or medium UK business, topical authority is how you compete with bigger sites. A specialist roofing firm in Kent is unlikely to beat a national home-improvement publisher on general home topics. On flat roofs, roof repairs and the questions Kent homeowners ask about them, a focused site with genuinely useful pages can do well.
It also compounds. Once a site is seen as a good source on a subject, new pages in that subject tend to be picked up and ranked faster, and other sites are more likely to cite it. At the time of writing (October 2026), the same signals also appear to influence which sources AI search tools draw on when summarising a subject.
The reverse is true as well. Publishing off-topic articles to chase traffic can blur what the site is about. A plumbing firm’s blog about celebrity homes may bring visitors who will never book a plumber.
Common mistakes
- Confusing topical authority with volume, then publishing dozens of thin pages that repeat each other.
- Treating “authority” metrics from SEO tools as if they were Google’s own measure.
- Covering a subject in disconnected posts with no links between them and no central page.
- Writing generic content with no sign of real experience: no examples, no process, no named author.
- Spreading across too many subjects at once instead of finishing one.
How to act on it
Choose the subjects that matter commercially, usually the ones closest to your main services. For each, list the questions your customers really ask, from first research to just before buying. Compare that list with what your site already covers, using Search Console to see which queries your pages already appear for.
Fill the gaps in order of value, improving existing pages before adding new ones. Link the pages into a clear structure with a central guide. Add evidence of experience: photos of real work, worked examples, an author with relevant background. Then earn recognition by producing something others in your field want to reference.
Planning which subjects to own and in what order is the core of my content SEO and strategy work.