Topic cluster

A topic cluster is a way of organizing content so both readers and search engines can see how pages relate. It has three parts:

• A pillar page that covers a broad topic and links out to the detail
• Cluster pages that each go deep on one specific subtopic
• Internal links connecting the cluster pages to the pillar and, where relevant, to each other

Example cluster

Brightside Dental builds a cluster around dental implants:

Pillar: /dental-implants/
  ├── /dental-implants/cost/
  ├── /dental-implants/vs-bridges/
  ├── /dental-implants/procedure-and-recovery/
  ├── /dental-implants/am-i-a-candidate/
  ├── /blog/do-dental-implants-hurt/
  └── /blog/how-long-do-dental-implants-last/

The pillar explains implants in plain terms, summarizes each subtopic in a few paragraphs, and links to the detailed page. Each cluster page links back to the pillar and to the consultation booking page.

Why it matters

For search engines, a cluster shows the site covers the subject in depth, which supports topical authority. The links pass signals between related pages and help Google understand which page is the main one for the broad term.

For readers, it’s simply easier to use. A patient researching implants can start at the overview and follow whichever question worries them most.

For planning, clusters stop you writing scattered one-off posts. Every new piece has a place.

How to plan one

1. Choose a core topic that matters to the business and has real search demand.
2. List the subtopics people search for: questions, costs, comparisons, problems.
3. Group keywords that share the same intent onto one page. Each page should have its own distinct focus.
4. Decide which page is the pillar and which are cluster pages.
5. Write, link, and keep adding as you find new questions.

Common mistakes

• Overlapping cluster pages. “Implant cost” and “how much are implants” are the same search; two pages will compete with each other (see keyword cannibalization).
• Forgetting the links. Without them, it’s just a list of related posts.
• A pillar that’s too thin to act as a hub, or so long it tries to replace every cluster page.
• Clusters with no commercial path. Each page should make the next step clear, whether that’s booking, calling or buying.

How to plan it in RankThat

RankThat’s Content tools suggest topic ideas, find content gaps against competitors, and support topical authority planning, so you can map a cluster before writing a word.