Keyword Clustering

Keyword clustering is the process of grouping related keywords that can be targeted by the same page. Instead of creating one page per keyword, you build one strong page for each cluster of keywords that share the same meaning and Search Intent.

Written by Paul Hoda, SEO consultant since 2005. Last updated 8 November 2026.

Why keyword clustering matters

Google understands that “SEO audit cost”, “how much is an SEO audit” and “SEO audit price UK” mean the same thing. A single page can rank for all of them. Creating separate pages for each would:

  • Split authority between similar pages.
  • Cause Keyword Cannibalisation.
  • Produce thin, repetitive content.
  • Waste time and budget.

Clustering also helps you plan Site Architecture and Topic Clusters so every page has a clear purpose.

Two ways to cluster keywords

By meaning and intent

Group keywords that clearly ask the same question or describe the same need. This is quick and works well for smaller lists, but it relies on judgement.

By SERP overlap

Compare the search results for each keyword. If two keywords share several of the same ranking URLs (for example, three or more of the top ten), Google treats them as closely related, and one page can usually target both. Many SEO Tools automate this, which is the most reliable method for large keyword lists.

How to cluster keywords step by step

  1. Gather your keyword list from Keyword Research, with volume, difficulty and intent.
  2. Remove irrelevant keywords that do not fit your business.
  3. Group by intent first: informational, commercial, transactional and local.
  4. Within each intent, group by topic, using SERP overlap where possible.
  5. Choose a main keyword for each cluster, usually the one with the best combination of volume and relevance.
  6. Map each cluster to a page: an existing page to improve, or a new page to create.
  7. Note supporting keywords to use in headings, FAQs and body text.

Clusters vs topic clusters

A keyword cluster is a set of keywords for one page. A topic cluster is a set of pages around a broader subject, linked together, with a pillar page and supporting pages. Keyword clustering is how you work out what each page in a topic cluster should target.

Example

Keywords such as “what is technical SEO”, “technical SEO meaning” and “technical SEO definition” form one informational cluster for a guide. “Technical SEO audit”, “technical SEO audit service” and “technical SEO audit cost” form a separate commercial cluster for a service page. The guide links to the service page, and both belong to the same broader topic cluster.

Common clustering mistakes

  • Grouping keywords with similar words but different intent, such as “SEO jobs” and “SEO services”.
  • Making clusters so broad that one page tries to answer everything.
  • Ignoring local variations that need separate pages.
  • Not revisiting clusters when search results change.

Keep your keyword map up to date and check it before creating any new page. It is one of the simplest ways to keep a growing website organised.

Key Takeaways

  • Keyword clustering groups keywords one page can target.
  • Cluster by intent first, then by meaning or SERP overlap.
  • Each cluster gets one main keyword and one page.
  • Clusters prevent cannibalisation and thin duplicate pages.
  • Keep your keyword map up to date.

Related Terms

Want to know where your site stands? Book a free SEO health check, or keep learning in the SEO Encyclopedia.