Topic Clusters / Pillar Map
A topic cluster is an SEO structure in which a comprehensive pillar page covers a broad topic and links bidirectionally to deeper cluster articles on specific subtopics. Google's algorithms treat this architecture as a signal of topical authority. Beyond SEO, the structure forces a discipline of coverage, you must define exactly what sub-questions your pillar page owns before you can build its supporting content.
A pillar page surrounded by interlinked cluster content for topical authority.
Pillar page → Cluster articles → Internal links → Topical authority
When to use this
- When organic search is a core acquisition channel and topical authority matters for rankings.
- When the content catalog is large but not structured, articles exist on all related topics but are not connected.
- When planning a new content vertical from scratch, to map the full topic space before writing begins.