Content cluster
A content cluster is a group of related articles — one pillar page plus multiple spoke articles — that internally link to reinforce a topical entity.
Updated July 5, 2026
In depth
Clusters are how AI engines learn that a site has depth on a subject. Density and internal-linking quality often matter more than raw word count. A well-built cluster is usually one pillar plus 6-12 spokes, each linking back to the pillar and to two or three siblings.
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