Keyword cannibalization happens when multiple pages on the same site target the same or very similar search terms, causing them to compete against each other for ranking rather than one clear page winning consistently.
Instead of one authoritative page building up rankings and relevance signals for a term over time, cannibalization splits that signal across two or more pages, and search engines may switch which one they show — sometimes both, sometimes neither ranking as well as a single consolidated page might have. It commonly happens unintentionally: a site publishes a new article on a topic without realising an older page already covers essentially the same ground, or several pages targeting slightly different but overlapping terms end up competing for the same broader query. Diagnosing it typically involves searching your own target term and checking whether Google is showing a different one of your own pages than expected, or checking a site: search alongside the term to see multiple of your own URLs appearing for it. The usual fixes are consolidating the competing pages into one stronger page with a redirect from the other, or clearly differentiating them to target genuinely distinct search intents rather than the same one.
Cannibalization quietly undermines content that might otherwise perform well — resolving it, by consolidating or clearly differentiating competing pages, often improves rankings for the surviving page more than any amount of further content or backlink work on the split pages would have.
keyword research and rank tracking tracks your organic Google ranking for every keyword you monitor, which can help surface cannibalization indirectly — if two of your own pages keep swapping which one ranks for the same tracked term, that's a signal worth investigating directly.
Search your target term directly and check which of your own pages Google is showing — if it's not the page you intended, or if it seems to switch between visits, that's a sign. A site:yourdomain.com search combined with the term can also reveal multiple competing pages at once.
Usually the best fix if both pages genuinely target the same intent — merging the strongest content from both into one page, with a redirect from the removed one, consolidates the ranking signal rather than continuing to split it.
Yes, and it's a common case — an informational blog post can end up competing with a commercial-intent product or service page for the same term, which usually isn't ideal since the two pages likely serve different stages of a visitor's journey and shouldn't be competing for the same exact query.
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