Topical maps for SEO: what one is, how to build it in six steps, and how to link it so the pages support each other

A topical map is a plan of every subtopic a website needs to cover a subject fully, arranged as a hub page, supporting pages and the links between them. Build it in six steps: define the subject and the audience, list the questions, group them into clusters, assign one page to each cluster question, set the internal links, and rank the pages by the order to write them. The map prevents two problems: gaps, where buyers ask something you never answered, and overlaps, where two of your pages chase the same query and weaken each other.

What a topical map is, and what it is not

The term comes from SEO practice. People say a site has "topical authority" when it covers a subject so completely and so consistently that it becomes the obvious source. That is a practitioner idea, not a score that Google publishes. What Google does publish is its guidance on helpful, people first content, which asks whether a page gives a complete answer and shows real expertise. A topical map is the working method for meeting that guidance across a whole subject, not one page at a time.

A topical map is not a keyword list. A keyword list holds phrases. A map holds decisions: which page owns which question, how the pages link, and what is written first. If you do not yet have the phrases, begin with keyword research in five steps.

The structure: hub, clusters and supporting pages

Layer	Job	Example for a business selling accounting software
Hub page	Covers the whole subject at an overview level and links to every cluster	Small business accounting
Cluster page	Covers one major part of the subject in depth	Invoicing, bookkeeping, payroll, tax filing
Supporting page	Answers one narrow question	How to write an invoice that gets paid on time
Conversion page	Offers the next step to a ready buyer	Pricing, demo, sign up

Each supporting page links up to its cluster, each cluster links up to the hub, and the hub links down to every cluster. Related supporting pages link sideways where a reader would want the next idea. The links are not decoration; they tell a search engine, and a reader, how the subject is organised.

Build the map in six steps

Step 1: define the subject and the reader

Write one sentence for each. "We help owners of firms with ten to fifty staff run payroll without errors." A subject that is too wide, such as "business", cannot be covered. A subject that is too narrow, such as one feature, does not need a map. Aim for a subject you can cover in thirty to a hundred pages.

Step 2: gather every question

Collect from five places: Search Console queries for your site, the results page for your core terms (including the related questions Google shows), sales call notes, support tickets and the questions in forums where your buyers talk. Put every question in a sheet. Do not judge yet.

Step 3: group into clusters

Sort questions by the topic they belong to. If two questions can be answered by the same page, they belong together; if they need different pages, they are separate. A quick test: search each question and compare the top results. If the same pages answer both, one page can serve both.

Step 4: assign one page per question group

Name the page, its main query and its purpose. Check existing content first, using a site content audit, and decide for each existing page: keep, update, merge or remove. A page that already answers a question should be improved, not duplicated.

Step 5: set the links

For every page, list the pages it links to and the pages that must link to it, with the anchor text. Anchors should describe the destination. Google's guidance on crawlable links covers the technical rule: use real links with an href.

Step 6: set the order

Write first the pages that sit closest to a sale and the hub, then the clusters that match your strongest proof, then the wider supporting pages. Rank by three things: closeness to revenue, how winnable the query is, and how much proof you hold. SEO competition research shows how to judge the second.

A map in a spreadsheet

Use one row per page and these columns:

• Cluster and layer (hub, cluster, supporting)
• Page title and URL
• Main query, plus other phrasings that belong on the same page
• Search intent: learn, compare, buy
• Status: exists, update, merge, write
• Links in, links out, with anchors
• Proof needed: data, example, quote, screenshot
• Priority and owner

The phrasings column is the main defence against overlap. Before you add a row, search the sheet for the query. If it exists, add the phrasing to that row instead of adding a new page.

Checking whether the map is complete

1. Pick a customer who bought. Can you follow their journey through your pages, from the first question to the purchase, with a page for every step?
2. Take the five questions your sales team hears most. Is there a page for each?
3. Look at your top three rivals' sites. Which topics do they cover that you do not?
4. Run the cluster through a crawler and look for pages with no links in. An orphan page is a map error.

The map is complete when every question your buyers ask has a page, no question has two, and every page is reachable in a few clicks from the hub. A map for the buyer questions themselves, with a scoring method, is shown on a buyer question topic map.

Keeping the map alive

A map is a working document. Review it every quarter: add new questions from Search Console, mark pages that need updating, and merge pages that drifted into the same topic. Publish on a rhythm you can keep, because a map with forty open rows and no output helps nobody. Coverage across the whole cluster counts, so finish a cluster before you start the next one.

Common mistakes

• Writing many pages for one question with small wording changes. They compete.
• Making a hub that only lists links. A hub should give a real overview and tell the reader which page to read next.
• Linking everything to everything. Link where a reader benefits.
• Ignoring the sale. A map with no conversion pages is a content plan for readers who never buy.
• Starting with the easy topics. Start with the topics nearest revenue.

The same map, read by an assistant

A well built cluster does a second job. When someone asks an assistant a question in your subject, the answer is assembled from pages that state the answer clearly and agree with each other, and a site that has covered the subject in connected pages gives the assistant more to quote. You can see this effect by asking the assistants the questions in your map and checking which brands are named. AI Knows Us (aiknowsus.com) runs those questions for a business across ChatGPT, Gemini, Perplexity and Google AI Overviews, so each cluster of the map can be checked for whether it earns a mention.

Questions about topical maps in SEO

How many pages does a topical map need?

As many as the subject requires. A small business subject often needs thirty to sixty pages, and a large one needs hundreds. Cover the clusters nearest revenue first.

Is topical authority a Google ranking factor?

Google has not published a score by that name. The idea is a way of describing complete, expert, well organised coverage, which Google's guidance on helpful content rewards.

Do I need a tool to build a topical map?

No. A spreadsheet and Search Console are enough. Keyword and crawler tools save time on larger sites.

How is a topical map different from a content calendar?

The map decides what pages should exist and how they link. The calendar decides when each is made. Build the map first.

How often should I update the map?

Review it every quarter, and after any change in your products, audience or search results.