Topical authority: plan content clusters for Google and AI

Most advice on topical authority starts with a spreadsheet of 200 keywords and ends with a plan to publish all of them. That is the quickest way to build a large, thin site, and it can also breach Google's scaled content abuse policy. This guide takes the opposite approach: pick a topic narrow enough to cover properly, write only the pages that earn their place, and link them so readers and search engines can see the whole picture.

It is written for small-business owners, content leads and in-house marketers planning a blog, guide hub or resource section. By the end you will be able to separate what Google has actually said about topical authority from SEO folklore, choose a topic you can own, map a cluster with a worksheet, decide whether each page is worth writing, link the pages together, plan a 12-week publishing order and measure the result. Statements about Google's guidance were checked in October 2026 and are linked where used.

What topical authority means, and what it is not

Topical authority is an SEO term for how far search engines and people treat a site as a dependable, go-to source on a specific subject, because it covers that subject thoroughly, accurately and from real experience. It describes an outcome. It is not a metric Google reports.

Three related terms come up in every guide on the subject:

• A content cluster (or topic cluster) is a group of pages on one subject: a core page that covers the topic broadly and several supporting pages that each answer one distinct question in depth, all linked together.
• A pillar page is another name for the core page. It gives the overview and links out to every supporting page. This guide calls it the core page.
• A topical map is a planning document that lists the sub-topics and questions within a subject and shows how they relate. It is a plan, not a publishing quota.

Topical authority is not a number. There is no topical authority score in Search Console. Scores with "authority" in their name in SEO tools are each vendor's own estimate, built from its own crawl data. They can help you compare sites, but they are not Google's view of your site, and raising them is not the goal.

The useful way to think about it is from the reader's side. A site has topical authority on a subject when someone who arrives with any reasonable question about it finds a clear, trustworthy answer, written by people who plainly do the work, and an obvious next step. Search visibility tends to follow from that, not the other way round.

What Google has actually said about topical authority

Google has not published a "topical authority" ranking factor for ordinary websites. It has described a topic authority system for news, said it uses site-wide signals alongside page-level ones, and asked site owners whether their site is focused and recognised as an authority on its topic. It has also said, more than once, that mass-producing pages to win rankings is spam.

Method: in October 2026 we read the Google Search Central pages and blog posts in the table below, recorded what each says about topic-level or site-level evaluation, and separated what Google states from what SEOs often infer. You can repeat the check; every source is linked.

Search Engine Journal's report dates the AI content change to 1 October 2026 and notes that the previous version asked for accuracy without calling for a manual fact-check.

What the comparison tells you

1. Focus is real, but it is not a score. Google asks about focus and topical recognition, and it uses site-wide signals. None of these documents says that publishing a certain number of pages on a topic builds authority.
2. The news system rewards being cited, not being big. Original reporting that others reference is one of its named signals. The closest equivalent for a business site is original material, such as your own process, photos or data, that others in your field link to or mention. That is our inference, not a Google statement.
3. Volume is the risk. The spam policies, the March 2024 announcement, the May 2026 AI guide and the AI content guidance all warn against large numbers of low-value pages, whoever or whatever writes them.
4. Each page still stands alone. Site-wide signals do not carry weak pages. Ten strong pages beat fifty thin ones.

What the 2024 leak does and does not show

In May 2024, internal Google Search API documentation became public. iPullRank's analysis of the leaked documents reported attributes named siteFocusScore, which denotes how much a site is focused on a specific topic, and siteRadius, which measures how far page embeddings deviate from the site embedding. iPullRank's reading is that Google compares page embeddings with the site embedding to see how off-topic a page is.

Google responded that the documentation lacks context, cautioning against inaccurate assumptions based on out-of-context, outdated or incomplete information. The documents do not say how any attribute is weighted or whether it is still used. Read them as consistent with Google's public questions about focus, not as a formula to optimise against.

Pick a narrow topic you can own

Choose a topic narrow enough that a small team can cover its important questions well within a few months, and close enough to what you sell that the visitors it attracts can become customers. A practical test: if you cannot list the ten questions customers ask most about it from memory, it is either too broad or not really your topic.

Four tests for a topic

1. Revenue link. The topic sits next to a service or product you sell. A firm that repairs sash windows should build around sash windows, not around "home improvement".
2. First-hand experience. You do this work and can show it: photos, process, judgement and numbers from your own jobs. Google's helpful content guidance specifically flags entering a niche without real expertise.
3. Coverable scope. You can answer the main questions properly in a manageable number of pages and keep them accurate afterwards.
4. Winnable results. Search the main questions yourself in Google and in an AI assistant, and look at who answers them today.

Broad or narrow: a quick decision flow

• If the topic spans several unrelated services (windows, doors and roofing, say), then split it and start with the service that brings the most profitable work.
• If the top results for your main questions are dominated by national publishers, then narrow by audience (period homes, landlords), by place or by a specific problem.
• If you cannot name ten genuine customer questions, then the topic is too narrow or not one customers think in; widen it by one level.
• If you have no first-hand experience of the topic, then do not build a cluster on it, however good the keyword numbers look.

Example (hypothetical): a five-person firm in York that repairs and draught-proofs timber sash windows. "Home improvement" is hopeless and "windows" is still too broad. "Sash window repair", with an angle on period homes, is a topic it can cover completely and that leads directly to paid work. This example runs through the rest of the guide.

Map the cluster: core page, supporting pages and questions

A cluster map lists the questions customers have about the topic, groups them by intent and decides where each one gets answered: on the core page, on its own supporting page, on the service page or nowhere. Start from real questions, not from a keyword-tool export.

Step 1: decide what the core page is

If most people searching the topic want to hire someone, the service page is the hub. If most want to understand the problem first, write a guide as the core page and link it prominently to the service page. Our post on choosing between a service page and a blog post explains the difference and how to stop the two competing.

Step 2: collect real questions

1. Questions customers ask on the phone, by email and during visits. Ask whoever answers the phone to note them for a month.
2. Queries already reaching your site, from the Performance report in Google Search Console.
3. "People also ask" boxes and related searches in Google for your main topic.
4. The follow-up questions AI assistants suggest when you ask them about the topic.
5. Topics competitors cover. The free Competitor Content Gap Finder reads your sitemap and competitors' sitemaps and lists topics they have pages on and you do not. Treat the output as candidates to test, not pages to copy.

Our keyword research guide explains how to check demand for the questions you collect and how to read search intent from the results page.

Step 3: sort questions by intent

Group the questions by what the person wants to do next: learn, compare or buy. You can paste up to 50 questions into the free AI Prompt Intent Classifier for a first sort by intent, from information to ready to buy, then correct it by hand, because you know your customers better than any classifier does. Questions with the same intent and the same answer belong on the same page, however differently they are worded.

Step 4: use fan-out as a completeness check

Google says AI Overviews and AI Mode may issue multiple related searches across subtopics and data sources to build a response, a technique it calls query fan-out (AI features and your website). For a question like "should I repair or replace my sash windows?", the related searches plausibly include cost, energy efficiency, lifespan and disruption. Our inference: a cluster that answers those sub-questions clearly gives Google's systems more of your pages to draw on. It does not mean one page per sub-question, and Google's May 2026 guide says the opposite.

Step 5: check entity coverage

An entity is a distinct, named thing: a part, material, process, standard, organisation or place. Thorough answers on a topic tend to mention the same core entities. For sash windows they include sash cords, pulleys, weights, parting beads, staff beads, meeting rails and putty. Run your core page and a strong competitor page through the free Entity Coverage Checker to list the entities each one mentions. A missing entity is a prompt to check whether you have left out something readers need, not an instruction to stuff in terms.

The cluster planning worksheet, with a worked example

The worksheet turns your question list into a page plan. Each candidate page gets a row, a score out of 10 and a decision, so the team can say no to most ideas for a stated reason. This is the original framework in this guide.

Method: each candidate is scored 0, 1 or 2 on five criteria. The criteria come from Google's people-first questions (focus, expertise, value beyond what others say), its scaled content warnings and plain business sense. The weights are deliberately equal so the score is easy to explain and argue about in a meeting.

The five "worth writing" criteria

The decision rule:

• 8 to 10: write it as its own supporting page.
• 5 to 7: answer it as a section of the core page or another page, or schedule it for later if it scores 2 on distinct intent.
• 0 to 4: skip it.
• Veto: a candidate that scores 0 on distinct intent never becomes its own page, whatever its total. Merge it into the page that already serves that intent.

Worked example: the York sash window firm (hypothetical)

The core page, a sash window repair guide linked to the service page, is not scored: it is the topic. Here are ten candidate supporting pages, scored in the order business link, distinct intent, demand, first-hand input and accuracy upkeep.

Ten ideas produce five supporting pages, two sections or later pieces, and three ideas that are skipped or merged. That is the point: the plan gets smaller, and every page left has a reason to exist that you could explain to a customer.

Columns for your own worksheet

1. Candidate page, written as the question in the customer's words.
2. Intent: learn, compare or buy.
3. Where it is answered: core page, supporting page, service page, a section, or skip.
4. The five scores and the total.
5. Unique input: the photo, data, example or opinion only you can add.
6. Links out: the core page, the service page and any sibling the reader will need next.
7. Links in: which existing pages should link to it once it is live.
8. Owner, draft date and next review date.

Avoid thin pages, cannibalisation and scaled content risk

A cluster goes wrong in three ways: pages with nothing new to say, several pages competing for the same intent, and pages made in bulk to catch keyword variations. The worksheet's distinct-intent veto and first-hand input score exist to stop all three before anything is written.

Scaled content abuse: where clusters cross the line

Google's spam policies define scaled content abuse as when many pages are generated for the primary purpose of manipulating search rankings and not helping users. The examples include using generative AI or similar tools to generate many pages without adding value for users, and stitching or combining content from different web pages without adding value. Google's May 2026 guide to generative AI features applies the same policy to separate pages for every query variation, fan-out queries included, when they are made mainly to manipulate rankings or AI responses.

So a topical map that turns every keyword in a tool export into a page is a risk, however well each page is written. The safe pattern is fewer pages, each with a distinct intent and something original in it.

Cannibalisation is rarer than it looks

Ranking with two pages for one keyword is not automatically a problem. In a 2024 Ahrefs study of multiple rankings, Ahrefs found about 9,700 keywords where its own site ranked with more than one page. When it reviewed a sample of 80 by hand, only one needed action. Most were what the study calls keyword diversification, such as a blog article and a tool page both ranking because they serve different searchers. For "seo case studies", by contrast, Ahrefs built a single pillar page and ranked better with it than it ever had with several pages.

Use this decision table when two pages in a cluster seem to overlap:

What not to do

• Do not make town pages by swapping place names into the same text. A town page needs real local work, photos and specifics to justify itself. If you serve several towns, our local SEO service covers how to show that without duplicate pages.
• Do not publish AI drafts until someone who knows the subject has checked every fact, including titles, meta descriptions and image alt text.
• Do not expand into a neighbouring topic just because a tool shows search volume for it.

If a past burst of mass publishing has already cost you traffic, our guide to recovering from a Google core update explains how to assess the damage and decide what to improve, merge or remove.

Link the cluster together

Link the core page to every supporting page, link each supporting page back to the core page, and add links between sibling pages only where a reader is likely to want the other page next. Every link should be an ordinary HTML link with descriptive anchor text.

Google's link best practices say Google can only reliably crawl a link that is an HTML a element with an href attribute, and that every page you care about should have a link from at least one other page on your site. The same page asks for anchor text that tells people and Google what the linked page is about.

Resist linking every page to every other page. A cluster of six pages where each links to all the others tells the reader nothing about which page matters or what to read next. Link where the sentence naturally calls for it.

Folders and URLs

Putting a cluster in its own folder, such as /sash-windows/, keeps it tidy and makes it easy to measure. Google's SEO Starter Guide says how you organise content may affect crawling and indexing once a site has more than a few thousand URLs, because folders can help Google learn how often different sections change. On a small site, choose whatever is easiest to manage. Do not move existing pages just to create a folder: changed URLs need redirects and carry their own risk.

After each page goes live, crawl the site to catch orphan pages (pages with no internal links pointing to them) and broken links. Our technical SEO audit checklist walks through the crawl and what to fix first.

Publishing order and cadence for a small team

Publish the core page first, then the supporting pages in score order, at a pace you can sustain with proper checks. For a team of one or two people, one well-made supporting page a week is a strong pace and one a fortnight is fine. Consistency matters more than speed, and speed never justifies skipping the fact-check.

A 12-week plan for the worked example

Why the core page goes first

Publishing the hub first means each new supporting page joins a structure on the day it goes live. Each time a supporting page is published, add a short summary of its answer and a link to it on the core page, so the hub always reflects the whole cluster.

When to widen the cluster

Widen only when the main questions are answered, the supporting pages are getting impressions and you have new first-hand material. Start the adjacent topic as its own small cluster (for the sash window firm, perhaps timber door repair) and link the two only where a reader would move between them.

Expect months rather than weeks before a new cluster shows its full effect. Our post on how long SEO takes sets out what usually moves first and what takes longer.

Show expertise across the cluster

Every page in the cluster should make it obvious who wrote it, why they know, and what first-hand evidence backs it up. Google's May 2026 guide recommends non-commodity content: material that offers value beyond common knowledge. Its example contrasts a first-hand review, which gives a unique perspective, with a summary that restates information already available elsewhere.

Practical signals of expertise

1. Name a real author: the person who does the work, with a short author page about their experience.
2. Show your own work: photos of your jobs, before and after, and your process step by step.
3. Give judgement, not only facts: say when you would repair rather than replace, and why. Competitors and AI summaries cannot copy judgement.
4. Keep facts consistent: the same terms, process and service details on every page in the cluster.
5. Date updates and review on schedule: the accuracy upkeep score shows which pages need the most frequent checks.
6. Check AI-assisted drafts line by line, metadata included, as Google's guidance now asks.

Before each page goes live, run it through the free On-Page SEO Checker with its target question to catch weak titles, heading problems and canonical errors. Our on-page SEO checklist explains what each item means and how to fix it.

Earn references from others

Google's news system weighs how often a publication's original reporting is cited by other outlets. The equivalent for a small business, in our reading, is original material that suppliers, trade bodies, local press and other specialists want to reference: a clear explanation of a process, a set of photos, a small piece of data from your own jobs. That kind of reference also matters for AI answers. Our guide to getting cited in AI search explains how AI assistants choose the sources they name.

Measure cluster performance

Measure the cluster as a group, not page by page: impressions, clicks and queries across all its URLs, appearances in AI features, and the enquiries that start on cluster pages. Review it every quarter and treat pages that stay flat as candidates to improve, merge or remove.

Two Search Console features worth knowing

Query groups, introduced in October 2025, cluster similar queries in Search Console Insights so you see main interest areas instead of a long list of individual queries. Google says the groups are computed using AI, may change over time and do not affect ranking. They are only available to properties with a large volume of queries, so many small sites will not see them yet.

The Generative AI performance report shows how many times links to your site were shown in AI Overviews and AI Mode, and its Pages view lets you check cluster URLs. Google says it rolled out to all websites on 31 August 2026 (checked October 2026), though it may not appear for a site with too few impressions. Our guide to the Search Console AI performance report explains how to read it.

A simple coverage score

Coverage score = questions on your map that are answered well ÷ all questions on your map × 100. "Answered well" means a direct answer in the first sentence or two, first-hand detail and a working link to the next step. Example: the sash window firm maps 20 questions and answers 14 of them well, giving 70%. Raise the score by improving sections and adding pages that pass the worksheet, never by adding questions you have no intention of answering.

The quarterly review

• If a page has impressions but few clicks, then improve its title and opening so the answer is clearer in search results.
• If a page has no impressions after three to six months and scored low on first-hand input, then add original material, merge it or remove it.
• If customers raise new questions, then add them to the worksheet and score them like any other idea.

When you report on the cluster, report it as a unit alongside the rest of your SEO work. Our post on what a monthly SEO report should include shows how to keep that report useful.

Where to start this week

Start with the topic and the question list; everything else follows from them. In order:

1. Pick one narrow topic tied to a service you sell and know first-hand.
2. Collect real customer questions from at least three sources and group them by intent.
3. Score every idea on the worksheet; plan only those at 8 or more as their own pages, and merge the vetoes.
4. Publish the core page, then one supporting page at a time, linked in and fact-checked, and review the cluster as a group each quarter.

Topical authority is what a focused, honest, well-organised set of pages looks like from the outside. Build fewer pages, make each one the best answer you can give, and let the structure show readers and search engines that you cover the subject properly.

If you would like help planning or writing a cluster around your services, that is the core of our content SEO service. When you are ready to talk it through, get in touch.