Definition
A topic cluster is a group of interlinked pages that cover a subject comprehensively, usually a central pillar page plus many supporting pages that link to it and each other.
On this page
At a glance
- Categories Content
- Related fields Content, SEO
- Difficulty Intermediate
How Topic Cluster Works
Rather than one page trying to cover everything, a cluster spreads a topic across a hub and its spokes, each spoke handling a specific sub-question and linking back to the hub. The internal links tie the pieces into a connected whole. It is the structural way to show an engine that your site covers a subject in real depth.
Why Topic Cluster Matters
AI engines, working through query fan-out, pull from across a topic, not a single page. A well-built cluster gives them strong content for many sub-questions and signals genuine authority on the subject. A glossary like this one is itself a cluster.
Frequently Asked Questions
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What is the difference between a topic cluster and topical authority?
The cluster is the structure you build. Topical authority is the credibility that structure earns you.
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How many pages make a cluster?
There is no fixed number. Enough to cover the subject's real sub-questions, all interlinked around a central page.