How to Find Keyword Cannibalization on Your Site

By Jim Huang, SEO Digital Marketing Consultant and AI Enthusiast · Last updated · Effort: Medium

What is keyword cannibalization?

Keyword cannibalization happens when two or more pages on your site target the same keyword and the same intent, so they compete with each other in the rankings. Similar keywords on pages with different intents are not cannibalization.

When two or more pages on your site target the same query, search engines have to pick one, often switch between them, and neither page ranks as well as a single strong page would.

Why it matters

Pages that compete with each other split links, engagement and rankings between them, and the page that ranks is not always the one you want to rank. It is only a problem when it costs performance. Mapping each keyword cluster to a single page is what stops two of your own pages from competing for the same query.

Value and limits

  • Practical value: Prevents wasted content, gives every page a clear job, and makes on-page and internal-linking decisions straightforward.
  • Limitation: Intent is read from today's results page and can shift, and keyword volumes from tools are estimates. Re-check intent when a page decays.
  • Effort and payoff: Medium effort up front, low to maintain. High payoff for new content and for sites with overlapping pages.
  • Evidence: Confirmed · 2+ sources

How to test it with SERP01

Issue: Two pages ranking for the same keywords is hard to spot by eye, so we check it with data.

  1. Open the Keyword Gap tool and choose exact URLs as the comparison type. Enter two of your own URLs that you suspect overlap.
  2. Read the shared ranking keywords. A long list of keywords where both URLs rank is a cannibalization candidate.
  3. Open the Keyword Grouper tool, create a project for your domain and paste or upload the keywords from the overlap list.
  4. Run the grouping. Keywords that land in one cluster share most of the same top-10 results, which means Google treats them as one topic that deserves one page.
  5. Open the clusters that contain keywords currently ranked by more than one of your URLs and note the volume and intent for each.

Actionable items

  • Choose the winner - keep the URL with the strongest links, the best intent match and the most conversions.
  • Merge and redirect - move the best content from the weaker page into the winner and 301 the weaker URL to it. A permanent redirect tells Google the target should be the canonical URL.
  • Differentiate when intents differ - if both pages serve genuinely different intents, rewrite their titles and headings so each targets its own query, and link between them.
  • Update internal links - point every internal link at the winning URL.
  • Re-check - run the comparison again after a few weeks to confirm the overlap is gone.

How SERP01 addresses this

Keyword Grouper clusters keywords by how much of their Google results overlap, so two different phrasings that return the same pages land in one cluster. Keyword Gap can compare exact URLs on the same domain, which shows where two of your own pages share rankings. The overlap list goes straight into the grouping from the same account.

Next step

Want to run this on your own site? Request a code and run Keyword Gap and Keyword Grouper yourself.

Related resources: How to Group Keywords by Search Intent, Not Guesswork, How to Map Topical Authority and Spot Pages to Merge, How to Build an Internal Linking Plan From Topical Gaps

About the author. Jim Huang is an established SEO Digital Marketing Consultant, SEO Director and AI enthusiast based in Arlington, Virginia. He specializes in search engine optimization strategy, digital growth, and building custom toolsets that leverage artificial intelligence.