Content Cluster (Topic Cluster)
A content cluster, or topic cluster, groups a central topic page (pillar page) with several in-depth subpages that are linked to one another and to the pillar page, in order to show search engines the topical authority of a website.
In practice
Instead of isolated individual blog articles, this creates a connected web of content that improves internal linking and long-tail rankings and raises the chance of being recognised by AI search systems as a comprehensive source on a topic – a central building block for GEO.