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Keyword cannibalization: definition

SEO

By Alvyn Detavernier, founder · published October 28, 2026

Definition

Keyword cannibalization happens when several pages on the same website target the same query with the same intent. Google then hesitates between them, rotates which URL it shows and splits links and signals across pages, so none of them ranks as well as a single consolidated page would.

Also known as: SEO cannibalization, content cannibalization

Symptoms to watch for

In Search Console, open the Performance report, filter by one query and switch to the Pages tab. Typical signs:

Several URLs share impressions for the same query over the weeks.
The position swings widely, for example between 6th and 18th.
The wrong page ranks: an old blog post instead of your service page.
Two pages carry nearly identical title tags.

What is not cannibalization

Two of your pages ranking together in the top five take up more of the SERP: that is a win, not a problem. Likewise, two pages on the same topic with different intents, such as "heat pump cost" and "how a heat pump works", do not cannibalize each other. Cannibalization means identical intent and both pages underperforming.

Five ways to fix it

Merge: combine the best of both pages into the stronger one and 301-redirect the other.
Differentiate: point the secondary page at another intent, with a new title and angle.
Canonicalize: if both pages must stay live, designate the main one with a canonical tag.
De-optimize: remove the keyword from the secondary page's title and H1.
Redirect internal links: make every anchor containing the keyword point to the main page only.

Prevention beats cure

Keep a keyword map that assigns each target query to exactly one URL, and check it before anything new goes live. Blogs that have published for years are the most exposed: a post titled "Roof Replacement Cost in 2022" followed by "How Much Does a New Roof Cost?" in 2025 is enough to create the problem. Updating the existing article every year works better than writing a new one, and it keeps every backlink the original page has earned.

Example

Example: two posts, "roof replacement cost" from 2022 and "how much does a new roof cost" from 2025, keep trading places between positions 8 and 15. The newer one is merged into the older one, updated, then 301-redirected: the consolidated page collects both sets of links and settles in the top five.

Frequently asked questions.

Does keyword cannibalization cause a penalty?

No. Google does not penalize it. The problem is dilution: links, clicks and relevance signals spread over several pages instead of concentrating on one, and Google keeps switching the URL it shows. The effect can look like a penalty, but consolidation fixes it.

How do I find keyword cannibalization on my site?

Search Console is the most reliable source: filter a key query in the Performance report and see how many pages get impressions for it. You can also search site:yourdomain.com plus the keyword on Google to list every page covering it, then compare their title tags and intent.

Related terms.

The concepts that go with it, to round out the definition.

SEO

Search intent

Search intent is the real goal behind a query: learning something, reaching a specific website, comparing options before buying or taking action now....

SEO

Canonical tag

A canonical tag (rel="canonical") is a hint placed in a page's head that tells Google which URL is the main version among several identical or very...

SEO

Internal linking

Internal linking is the network of links that connect pages within the same website. It lets crawlers discover every page, passes authority earned...

SEO

301 redirect

A 301 redirect is a server response stating that a page has permanently moved to a new address. Browsers and crawlers are sent to the new URL...

SEO

Duplicate content

Duplicate content is identical or very similar text that can be reached at more than one URL, on the same site or across different websites. Google...

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