How to fix it
Merge them and redirect the extras, or set a canonical tag on the duplicates pointing at the version that should rank.
When it is not a problem
There is no duplicate-content penalty in the sense the phrase usually implies. The cost is dilution and an arbitrary choice being made for you, which is why a canonical tag is generally a better answer than deleting pages.
How Rankelle handles it
- SeverityWarning. It costs traffic or clarity without stopping anything, which is where most real work lives.
- DetectionDetected by comparing pages against each other after the crawl finishes, because no single page can show it on its own.
- GroupingEvery page with this finding under the same URL pattern becomes one cause, with a confidence taken from how much of the pattern is affected. 400 of 400 is a template; 6 of 14 is phrased as a question.
- LandingThe affected URLs stay under cheap watch. When this finding is gone from all of them, the fix is marked landed without anyone reporting the deploy.
- VerdictAt landing, comparable untouched URLs are frozen as a control set. Twenty-eight days later the two are compared, and the fix can come back as having done nothing.
Try it on your own site, free
No card, and the free tier does not expire — the first verdict takes about six weeks to arrive.