Duplicate content - Product Categories
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Dears,
I've use "Site Crawl" tool to find any SEO warnings, and I found 991 duplicated content. The problem is that the pages are not duplicated its all products category pages, please check this exmaple:
This page:
https://www.jobedu.com/en/shop/category/prints/Postcards/na/all-colors/all-size
and this page:
https://www.jobedu.com/en/shop/category/Accessories/keychain/na/all-colors/all-size
It said its duplicated, and it's 991 pages!
How to fix this this? what I can do?
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Hi,
You need to categorize them as canonical url's (rel=canonical ), you can do this pretty simply in CMS's like Magento etc. - just Google for a guide

“Canonical links”, is an HTML element that helps webmasters prevent duplicate content issues. It does this by specifying the “canonical URL”, the “preferred” version of a web page. Using it well improves a site’s SEO. Source
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I looked at your source code and searched for product names and couldn't find any. This tell me that your products are being pulled in with JavaScript, which I confirmed by disabling/enabling JS, products don't show with it disabled. Since JS is populating your product lists, and that's the only real difference on each page, Moz is flagging it as duplicate because the source code is more than 90% the same. In order to fix this, you'll have to either pull in products a different way, or figure out a way to create unique content for each page that isn't rendered via JS.
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It's best practice to include +/-100 word Category Descriptions above your product listings. Adding a useful and robust "buyers guide" below the products is also extremely helpful. I'd be less concerned about "duplicate content" warnings from crawlers if your pages are ranking well. We get plenty of warnings from DeepCrawl for pages that are ranking in the top 3 for highly competitive terms.