Keyword cannibalization: when two pages for one query is a problem

When two or more of your pages appear for the same query, they can compete with each other. That is keyword cannibalization. The name implies damage, but plenty of overlap is harmless, so the first step is deciding whether you have a problem at all.

When it is a problem

Two pages for one query is a problem when:

• they swap positions from week to week,
• neither ranks as high as one strong page would, or
• Google shows the weaker page for the query you want the other to win.

The common signs are unstable rankings and clicks split between pages that should not be rivals.

When it is not

A guide and a product page can both appear for one query, each answering a different need. Showing two of your pages for a query can even take more room on the results page. Look at what each page is for before treating the overlap as a fault.

Four fixes

Decide what each page is for, then pick one:

1. Merge. If both say the same thing, combine the best of each into one page and redirect the other to it.
2. Differentiate. If they serve different needs, change titles, headings and content so each targets its own query.
3. Point the weaker page elsewhere. Add internal links with clear anchor text from the weaker page to the one you want to win.
4. Mark a duplicate. If one page is a copy, set the canonical URL to the page you prefer.

Be careful with redirects. They are hard to undo, and a mistaken merge can lose a page that was ranking for something else.

Measure the outcome

Annotate the date of the change and watch the query for about four weeks. A good result is one page holding a steadier, higher position.

SerpUp's cannibalization report lists queries where more than one of your pages gets meaningful impressions, shows the share each page takes and how positions have moved. Start with the queries that have the most impressions and a split that flips between pages. Merges and redirects can be raised as tasks that wait for a person to approve them, and the Action Center then checks the result at 7, 14 and 28 days.

Short version: treat overlap as a problem only when pages swap places or hold each other back, then merge, differentiate, link or set a canonical.