What is a topic cluster?
A topic cluster is a group of pages built around one subject, anchored by a broad hub page and linked to a set of narrower supporting pages that all link back to it and to each other.
The hub page covers a subject broadly, and each supporting page goes deep on one piece of it, a pricing guide, a how-to, a comparison. The links running between them are what make it a cluster rather than just a folder of posts that happen to share a tag: they tell a reader where to go deeper, and they tell any system crawling the site how the pages relate to each other.
That linking structure matters more for AI visibility than it used to. Systems that ground an answer in a source often pull from several passages on the same domain to decide how much to trust it, so a shallow cluster of three thin posts can perform worse than a single well built page on its own. Depth spread across a real structure reads as credibility in a way that depth spread across disconnected pages does not.
The common failure is building the hub page once and then stopping. New posts get filed into the same category but never actually link back to the hub or sideways to each other, so what looks like a cluster in the site's navigation is really just a pile of loosely related content.
Related
- Topical authorityTopical authority is how reliable and comprehensive a site is treated as being on a specific subject, built through depth of coverage across many pages rather than through any single page.
- Internal linkingInternal linking is the practice of linking from one page on a site to another page on the same site, helping readers and crawlers move between related content.
- Content briefA content brief is a document written before a piece of content that specifies what it must cover, who it's for, and what question it needs to answer, so the writer isn't guessing at scope.
- CannibalisationCannibalisation is when two or more pages on the same site target the same query or intent closely enough that they compete with each other instead of one page winning clearly.
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