Keyword cannibalization is when two or more pages on one site answer the same query with the same intent. The search engine doesn’t know which to show, so it picks one, sometimes changing its choice from week to week. Links, clicks and attention are spread across several weaker pages instead of building one strong one.
When it’s a problem and when it isn’t
Not every overlap hurts. A service page and an article on what that service costs cover the same topic but answer different questions. The first is for someone choosing a provider, the second for someone still working out a budget. Pages like that can, and should, exist side by side.
The problem starts when the intent is the same. Typical cases on company websites:
- A blog post that repeats a service page, with the same title and the same promise.
- Several near-identical location pages that differ only in the city name.
- An old and a new version of the same guide, both published.
- Tag and category archives that show the same posts at different addresses.
How to find it
- Google Search Console. In the search results report, pick a query that matters to you and open the list of pages. If impressions for one query are spread across several URLs, and the position jumps whenever the page being shown changes, you have a candidate.
- Search. Type
site:yourdomain.comand the phrase you care about into Google. If several pages come up with almost the same title, take a closer look. - A content map. In a spreadsheet, list all the important pages and assign each one main query. Duplicates show up immediately.
How to fix it
- Merge. If two pages say the same thing, combine them into one better page. Take the best of both and redirect the older URL to the new one with a 301 redirect. It’s the most common and usually the most effective fix.
- Separate the intents. If both pages are needed, rewrite them so they answer different questions. Change the titles, the headings and what they promise in the first paragraph.
- Set a canonical version. When duplicates have to exist, such as product variants at different URLs, a canonical tag tells the search engine which version to treat as the main one.
- Tidy up internal links. Supporting pages should link to the main page for the topic, with descriptive link text. That signals which page matters most.
- Take what has no value out of the index. Tag archives and similar listing pages are often better marked noindex.
After the changes, give the search engine a few weeks. Check in Search Console whether impressions for the query now concentrate on one URL.
How to avoid it
The simplest way: before you write something new, check the content map for a page that already answers that question. If there is one, update it instead of writing another. Updating a good page usually does more than one more article on the same topic.
It’s the same principle we wrote about in E-E-A-T in practice: fewer articles, but ones that cover the topic fully. If you want to bring order to your site’s content and SEO, see how we approach marketing.
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