Topic Cluster.
Learn what Topic Cluster means in modern search and SEO.
A content architecture model with one pillar page covering a broad topic and multiple cluster pages covering related subtopics, all interlinked.
A Topic Cluster is a content architecture strategy consisting of a Pillar Page (comprehensive coverage of a broad topic) and multiple Cluster Pages (in-depth coverage of related subtopics), all interconnected through strategic internal linking. The pillar links to all cluster pages; each cluster page links back to the pillar. This structure signals topical authority and depth to search engines.
Why Topic Clusters Work
Topic clusters work because they mirror how search engines evaluate topical expertise. A site with a 5,000-word pillar page on 'content marketing' and 15 supporting cluster pages on related subtopics demonstrates far deeper expertise than a single standalone article. The internal linking structure ensures PageRank flows efficiently through the cluster, boosting the ranking potential of all pages.
Building Topic Clusters
Start with keyword research to identify a pillar topic and its supporting subtopics—each should have meaningful search volume but map to a distinct aspect of the main topic. Create the pillar page first (comprehensive but not exhaustive), then build cluster pages that dive deep into each subtopic. Internal links should use descriptive anchor text and be contextually placed within content, not just in navigation.
Articles about Topic Cluster
Read more on the Aergos blog.
What Is a Topic Cluster and Should You Build One?
Topic clusters are everywhere in content strategy conversations, but the execution is messier than the diagrams make it look. Here's what the model actually involves, when it pays off, and when you're better off doing something else first.
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An SEO competitor analysis tells you exactly why your competitors rank above you — and what it would take to pass them. This step-by-step guide covers how to find the right competitors, dissect their keywords and backlinks, and turn what you learn into a plan that moves rankings.
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Internal Linking: The SEO Strategy Most Sites Get Wrong
Internal linking is one of the highest-leverage SEO moves you can make — and most sites completely botch it. This guide covers anchor text, link depth, orphan pages, and the pillar-cluster model so you can fix yours today.
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The Semrush AI Toolkit gives you a solid starting point for AI search visibility inside a tool you already know. But depending on your agency's workflow and client needs, it might only get you halfway there. Here's how to tell the difference.
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