Glossary
What is a content cluster?
A content cluster is a group of pages on one subtopic, linked to each other and to a central pillar page that covers the topic broadly. Each cluster page answers one specific question in depth. The linking helps search engines see the coverage and helps readers move between related answers.
Structure
- One pillar page covering the topic broadly.
- Cluster pages, each covering one subtopic or question.
- Links: pillar to every cluster page, each cluster page to the pillar and to related siblings.
Why it works
Clusters make coverage obvious to search engines and readers. Internal links spread authority from the pages that earn links to the rest. And clear boundaries between pages prevent keyword cannibalization.
Example
Pillar: "Directory submission". Cluster pages: dofollow directories, free directories, why submissions get rejected, how to track submissions, how to measure directory traffic, automated submission. Each links back to the pillar and to the two or three most related cluster pages.
Building one
- Pick a subtopic from your topical map.
- List the questions people ask about it.
- Decide which questions get their own page and which are sections of the pillar.
- Write the pillar first, then cluster pages.
- Link each new page from the pillar and from one or two siblings the day it goes live.
FAQ
How many pages make a cluster?
Usually five to twenty, depending on the subtopic.
Is a cluster the same as a category?
Not quite. Categories are navigation; clusters are planned around questions and linked in content.
Should cluster pages link to each other?
Where it helps the reader, yes.
Do clusters work for AI search too?
Yes. Connected pages covering a subtopic give retrieval more matching passages.