Keyword Cannibalization Checker

What is SERP Overlap?

Keyword cannibalization is rarely obvious. Should "content marketing strategy" and "content strategy" be one page or two? That's not a gut-feel decision. If Google returns 8 of the same domains for both terms, it is treating them as close to the same question, and two pages of yours are then competing for one slot. This tool gives you that number instead of a hunch.

It pulls live Google results for both keywords and compares the top 10 domains from each. Above 60% overlap, one page can probably serve both. Below 30%, keep them apart. The thresholds are a rule of thumb, not a Google metric, so check the SERP features too: when one keyword triggers a Local Pack and the other doesn't, the intents differ no matter what the percentage says.

How do you know you have keyword cannibalization?

Four signs to watch. Multiple URLs from your own site ranking for the same query in your GSC report. Sudden position fluctuations on one URL without any content change. A new page that pushed an older one out of the top 10 instead of adding a second spot. And declining CTR on both pages as Google flips between them.

How to fix keyword cannibalization

Pick the winner. When two of your pages compete, one usually has better backlinks, a cleaner URL, or a tighter topical focus. Move any unique content from the loser into the winner first, then 301 the loser's URL to it, then repoint every internal link that still goes to the old one. How fast Google reflects the merge depends on how often it crawls those URLs, so expect weeks rather than days on a small site. The alternative, leaving both up and hoping Google picks the right one, hands the choice to Google.

Cannibalization vs. keyword clustering

Cannibalization is accidental competition with yourself. Clustering is deliberate grouping of keywords under one URL because they share intent. Same outcome, different intention. Cannibalization means you failed at clustering.

Keyword cannibalization on ecommerce sites

On ecommerce sites, cannibalization is basically the default. Category pages, tag pages, product pages, and brand-filter pages can all end up targeting the same query. A shoe store with /running-shoes/, /shoes/running/, /running/, and /shoes/?filter=running all ranking for "running shoes" has a crawl budget problem and a ranking problem at the same time. Pick one URL, redirect the true duplicates to it, fix the internal links, and keep filter URLs you don't want in search out with noindex. Robots.txt can stop them being crawled instead, but not on the same URLs: Google can't see a noindex on a page it isn't allowed to fetch.

Preventing keyword cannibalization when you scale content

It starts when the content team grows past one person. Writer A publishes on "content marketing strategy" in Q1. Writer B publishes on "content strategy" in Q3 without checking. A keyword map catches this before it happens. Before a new piece goes live, compare the target keyword's SERP against existing pages. If the overlap is over 60%, update the existing page instead.

Explore more tools

FAQ