What is keyword cannibalization?
Keyword cannibalization happens when several pages on your site compete for the same search query with the same intent. Instead of one strong page ranking well, two or three weaker ones take turns, and Google swaps between them. Each page collects only part of the links, engagement, and relevance signals that one consolidated page would.
Having several pages mention the same keyword is not cannibalization. It becomes a problem when the pages serve the same purpose for the same searcher, such as three separate posts all answering "how to clean a burr grinder".
How it works
Google usually shows one or two results per site for a query. When it has several near-equivalent candidates from your site, it has to choose, and its choice can change from week to week. In Search Console this shows up as multiple URLs getting impressions for the same query, with positions and clicks moving between them.
Symptoms to check:
- Two or more of your URLs with impressions for the same important query in the Performance report.
- The URL ranking for a query changing often.
- A newer post outranking the older, more complete guide on the same topic.
Not every overlap needs fixing. A category page and a buying guide can both rank for a product term because they serve different intents. Look at search intent first.
Example
A coffee blog has three posts: "Cleaning Your Grinder" (2021), "How to Clean a Burr Grinder" (2023), and "Grinder Maintenance Tips" (2025). All get impressions for "how to clean a burr grinder" and none reaches the top five.
The fix: merge the best material into one comprehensive guide at the strongest URL (the one with the most links and traffic), 301-redirect the other two to it, and update internal links. Alternatively, re-angle one post around a genuinely different query, such as "how often to replace grinder burrs".
In WordPress
Cannibalization builds up on WordPress blogs that publish for years, and tag archives that match post titles can add to it. Hydrogen SEO's site-wide audit flags posts competing for the same query, and its focus keyword field makes overlap easier to see. Merge with a 301 in the Redirection Manager; see site audits.
Common mistakes
- Deleting one page without a redirect, losing its links.
- Canonicalizing pages that are not duplicates to hide the overlap.
- Treating every shared keyword as a problem when the intents differ.
Common questions
Is keyword cannibalization a penalty?
No. It is an efficiency problem: your own pages split signals and Google has to choose between them.
Should I merge or delete cannibalizing pages?
Merge the useful content into the strongest page and 301-redirect the others to it. Keep separate pages only when each serves a clearly different intent.