What is topical authority?
Topical authority describes how completely and credibly a website covers a subject. A plumbing company with one page on 'plumber' has little. A plumbing company with connected pages on leak detection, water heaters, drain blockages, emergency call-outs and pricing, all linked and kept accurate, has a lot more.
Google does not publish a 'topical authority score', and the term comes from the SEO community, not from Google. Still, the idea fits how search systems are described: they try to understand topics and entities, and reward content that helps people finish their task. Treat it as a useful planning model, not a ranking factor you can read off a dashboard.
For small businesses it has a practical benefit. You rarely win by out-spending a big brand, but you can win by being the most useful source on a narrow topic in your city.
How do topic clusters work?
A cluster is a group of pages around one subject, with one broad page at the centre and several narrower pages around it.
| Part | Job | Example for a web studio |
|---|---|---|
| Pillar page | Covers the whole topic at a high level and links to every supporting page | A service page such as web development |
| Supporting pages | Each answers one narrower question in depth and links back to the pillar | Cost guides, comparison posts, checklists |
| Commercial pages | Convert the interest into a quote request | Pricing and contact pages |
| Internal links | Show search engines and readers how the pages relate | Descriptive anchors between all of the above |
A pillar can be a service page, a long guide or a category page. What matters is that it clearly owns the broad topic.
How should you link a cluster together?
Internal links are how a cluster becomes visible. Link from each supporting page up to the pillar, from the pillar down to each supporting page, and sideways between pages that answer neighbouring questions.
Use descriptive anchors that say what the next page is about. 'See what makes a website SEO-friendly' tells readers and search engines more than a bare 'here'. Avoid linking every page to every other page. A few relevant links beat a wall of them.
- Link new articles from at least two older, relevant pages.
- Keep the key service and pricing pages one or two clicks from the home page.
- Fix orphan pages that have no links pointing to them.
- Review links when you merge or delete pages, so none point to dead URLs.
A page that is not linked may also never be crawled. Our guide on getting your site indexed shows how to check.
Depth or breadth: which matters more?
Both, in the right order. Go deep first on the few topics that drive your revenue, then widen. A site with five thorough pages on its core service will usually beat a site with fifty thin pages across twenty subjects.
Depth means covering the questions a buyer asks at each stage: what it is, how it works, what it costs, how to choose, what can go wrong. Breadth means adding adjacent topics once the core is solid, such as city pages or industry guides. Thin pages added only to look big can lower the quality of the whole site.
Keyword research for semantic and long-tail terms
Start with the head term your customers use, then collect everything around it. Sources include Search Console queries, People Also Ask, autocomplete, competitor headings and the questions customers ask on calls and WhatsApp.
- Group by intent. Separate learning questions, comparison questions, price questions and ready-to-buy searches.
- Cluster by meaning, not by wording. 'Fix a leaking tap' and 'tap dripping repair' belong on one page, not two.
- Add the modifiers real people use. City, price, emergency, near me, and in the UAE, Arabic equivalents.
- Choose one primary query per page and let related phrases appear naturally in headings and body text.
A worked example: a fictional plumbing company
Imagine Harbour Plumbing, an invented plumbing company in Austin, Texas. Its goal is calls for emergency leak repair and water heater work. Here is a cluster and content plan for it.
| Page | Role | Primary query | Links to |
|---|---|---|---|
| Plumbing services in Austin | Pillar and service page | plumber Austin | All supporting pages and the quote form |
| Emergency leak repair | Commercial service page | emergency plumber Austin | Leak detection guide, pricing page |
| How to find a hidden water leak | Supporting guide | how to find a hidden leak | Emergency leak repair, pillar |
| Water heater repair or replace? | Supporting comparison | repair or replace water heater | Water heater service page, pricing |
| How much does a plumber cost? | Supporting pricing guide | plumber cost Austin | Pillar, contact page |
| Plumbing FAQ | Supporting Q and A page | plumbing questions homeowners ask | Each service page |
| Round Rock and Cedar Park pages | Location extensions | plumber Round Rock | Pillar and relevant service pages |
The company and page names are invented for illustration. The same shape works for a web design company, an accountant or a clinic.
How to build a cluster, step by step
Choose the money topic
Pick the one service or product line that matters most to your revenue.
List the questions around it
Collect searches, customer questions and competitor headings, then group them by intent.
Publish the pillar first, then supporting pages
Make the pillar complete, then add supporting pages in order of customer value.
Link everything deliberately
Connect pillar and supporting pages with descriptive anchors and check for orphans.
Maintain and extend
Update facts, merge overlap and add new questions as they appear.
How do you measure topical authority?
No single metric measures it. Look at patterns. In Search Console, watch whether the number of queries each page appears for grows, whether new supporting pages gain impressions, and whether the pillar's average position improves for the head term. Track enquiries and branded search as well.
Compare cluster performance over several months. Expect slow movement and some noise. If a cluster is indexed, linked and useful but still stagnant, review the content against what ranks, using why your website is not ranking on Google as a diagnostic.
Why topical authority also helps AI search and local SEO
A clear cluster gives AI assistants a consistent set of passages to quote and a clear picture of what you do, which supports generative engine optimisation. The same structure supports local SEO, because city and service pages sit inside the cluster rather than floating alone.
If you want a plan built for your market, our SEO services include cluster planning, and our AI search optimisation work covers how the content is read by assistants.
Topical authority: common questions
Is topical authority a Google ranking factor?
Google does not publish a topical authority score. The term comes from the SEO community. It is a useful way to plan content so that your site covers a subject completely, which tends to help rankings, but no one can promise a result.
How many pages make a topic cluster?
There is no fixed number. A small business might start with one pillar page and five to eight supporting pages around its main service. Quality and links between pages matter more than the count.
What is the difference between a pillar page and a supporting page?
A pillar page covers a broad topic and links out to every related page. A supporting page answers one narrower question in depth and links back to the pillar.
Can a small local business build topical authority?
Yes. A narrow topic in one city is often easier than a broad national one. Cover your core service thoroughly, add city and question pages, and keep your Google Business Profile consistent.
How long does it take to see results?
Usually months, not weeks. Pages must be indexed, linked and refined. Track impressions and queries per page in Search Console, and expect gradual movement.
Should I publish many short articles or a few long ones?
Publish pages as long as they need to be to answer the question well. Many thin pages can dilute quality. A few thorough pages that are linked properly usually perform better.
Does internal linking really matter?
Yes. It helps search engines discover pages and understand how they relate, and it guides readers to the next useful step. Use descriptive anchors and avoid orphan pages.