What is Topic cluster?
A topic cluster is a group of linked pages on one subject: a broad pillar page that covers the topic overall, and several cluster pages that each go deep on one subtopic, all linking to each other.
Topic clusters help search engines see that a site covers a subject thoroughly, which builds topical authority.
They also prevent keyword cannibalization, because each page in the cluster targets a different intent.
Topic cluster example
| Page | Role | Target keyword |
|---|---|---|
| Local SEO guide | Pillar | local SEO |
| How to optimise Google Business Profile | Cluster | optimise Google Business Profile |
| What are local citations | Cluster | local citations |
| How to get more Google reviews | Cluster | get more Google reviews |
| Local SEO checklist | Cluster | local SEO checklist |
| Local SEO services | Commercial page | local SEO services |
How to build a topic cluster
- 1Pick a core topic tied to revenue.
- 2Run keyword research and group terms by intent.
- 3Assign one primary keyword per page.
- 4Write the pillar and cluster pages.
- 5Link cluster pages to the pillar and the pillar to every cluster page.
- 6Link the cluster to the related service page with descriptive anchors.
- 7Track the cluster's combined traffic and rankings.
Topic cluster mistakes
Too many overlapping pages
Each page needs its own intent.
No link to the commercial page
Clusters should guide readers toward your service.
Clusters on unrelated topics
Stay close to what you sell.
Publishing and forgetting
Update the cluster when the topic changes.
Topic cluster vs pillar page
| Term | Meaning |
|---|---|
| Pillar page | The main page covering a broad topic |
| Cluster pages | Detailed pages on subtopics |
| Topic cluster | The pillar plus its cluster pages, linked together |
Measuring topic cluster success
- 1Track rankings for the pillar keyword and all cluster keywords.
- 2Watch total clicks to the cluster, not only single pages.
- 3Check that internal links between pillar and clusters stay intact.
- 4Add new cluster pages for questions that still lack coverage.
Topic clusters for local businesses
Topic clusters are not only for big publishers. A local roofer can build a cluster around roof repair, with guides on leaks, storm damage, materials and costs all linking to the main roof repair page. This shows depth on the topic and gives the service page strong internal support.
Topic cluster planning template
| Element | Example for a running shoe store |
|---|---|
| Pillar topic | Running shoes guide |
| Cluster page | How to choose trail running shoes |
| Cluster page | Running shoes for flat feet |
| Cluster page | How often to replace running shoes |
| Cluster page | Cushioned vs minimalist running shoes |
| Money pages linked | Trail shoes category, road shoes category |
How topic clusters support topical authority
Search engines try to understand which sites cover a subject thoroughly. A cluster of connected pages that answer the main questions on a topic, linked to a central pillar, shows that depth far better than scattered posts on unrelated subjects. Over time, the whole cluster tends to rank better, including the commercial pages it links to.
Clusters also help readers. Someone who lands on one question can move to related answers without returning to search, which increases time on site and the chance they convert. Plan clusters around your products or services so the authority you build supports pages that bring revenue.
Internal linking rules for clusters
- 1Link every cluster page to the pillar with descriptive anchor text.
- 2Link the pillar to every cluster page, usually in a contents list or section summaries.
- 3Link between cluster pages only where the reader genuinely needs the related answer.
- 4Link cluster pages to the most relevant product or service page.
- 5Check for orphan pages each quarter and add links to any that are missing.
Why Topic cluster matters for SEO
They build depth and authority on core topics.
Internal links spread authority across the group.
How Topic cluster works
Building a topic cluster takes three steps.
Choose the pillar
A broad topic that matches your services.
Map subtopics
List questions and subtopics, one page each.
Link
Pillar links to every cluster page; each links back and to related pages.
A roofing company builds a "roof replacement" pillar with cluster pages on cost, materials, timing, insurance and permits. The pillar starts ranking for broad terms and the cluster pages win long tail searches.
Topic cluster checklist
- ✓Pick pillars tied to services
- ✓One intent per cluster page
- ✓Link pillar and clusters both ways
- ✓Use descriptive anchor text
- ✓Update the cluster as a group
- ✓Track rankings by cluster
Common Topic cluster mistakes
Overlapping pages
Leads to cannibalization.
No links back
Weakens the cluster.
Thin cluster pages
Do not add depth.
Too broad a pillar
Hard to cover well.
Related SEO terms
Topic cluster FAQs
What is a topic cluster?
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A pillar page and linked subtopic pages on one subject.
How many pages should a cluster have?
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Enough to cover the main subtopics, often 5 to 20.
How do I choose cluster topics?
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Use keyword research and customer questions.
How long does it take for a topic cluster to rank?
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Individual cluster pages can rank for long tail searches within a few months. The pillar and broader terms usually take longer, often six months or more, as the cluster grows and earns links.
Do topic clusters work for small websites?
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Yes. A small business can build one focused cluster around its main service, such as a pillar on kitchen remodelling with six to ten supporting guides. One strong cluster often beats many unconnected posts.
How is a topic cluster different from a pillar page?
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The pillar is one page; the cluster is the whole group.
Do topic clusters help SEO?
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Yes, they build topical authority and clear internal linking.
Should cluster pages link to each other?
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Yes, where relevant, as well as to the pillar.
Can one page belong to two topic clusters?
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It can link to both where relevant, but give each page one main cluster and one primary keyword. Clear structure helps both readers and search engines understand where it fits.
Should old blog posts be added to a cluster?
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Review them first. Update posts that fit the cluster, link them to the pillar and merge or redirect thin posts that overlap with stronger pages.