Glossary
///DEFINITION
What is Topic Cluster?
A topic cluster is a content structure where one pillar page covers a broad topic and multiple supporting articles cover subtopics, all internally linked together.
The pillar page targets the broad head keyword. The cluster articles target long-tail subtopics. Internal links between them signal to search engines that the site covers the topic comprehensively.
Topic clusters are the dominant content architecture for building topical authority in 2026. They replace the older approach of publishing isolated articles around random keywords.
Related terms
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