Content · Intermediate

Topic cluster

A topic cluster is a group of pages on related subtopics that link to a central pillar page. Clusters show search engines and AI systems that a site covers a subject thoroughly.

By Thryv StudioUpdated

Category
Content
Level
Intermediate
Structure
One pillar page, many linked cluster pages
Links
Pillar ↔ each cluster page, and between related pages

What is a topic cluster?

A topic cluster organizes content around one broad subject. The pillar page gives an overview of the whole topic; cluster pages go deep on specific subtopics and link back to the pillar, and the pillar links out to each of them.

For example, a pillar on "AI search" with cluster pages on AEO, GEO, AI Overviews, llms.txt and measuring AI visibility.

Why it works

  • Internal links concentrate authority on the pillar and spread it across the cluster.
  • Search engines see clear topical coverage.
  • Readers can move naturally from overview to detail.

Frequently asked questions

How many pages does a cluster need?

As many as the topic's real subtopics. Quality and coverage matter more than a number.

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