If you receive a notification saying "Duplicate without user-selected canonical" in Google Search Console, it means that Google has detected multiple pages on your website with similar or identical content, but no clear canonical (preferred) version has been specified. This can cause confusion for Google and make it difficult for the search engine to determine which page to index and rank in search results.
To fix this issue, you can specify a canonical version for each group of similar or duplicate pages on your website. This can be done by using the rel="canonical" link element in the <head> section of each page. For example, if you have two pages with similar content, you can add the following code to the <head> section of each page:
<link rel="canonical" href="https://www.example.com/page1">
In this example, the
rel="canonical" link element specifies that the page with the URL
"https://www.example.com/page1" is the preferred or canonical version of the two pages. This tells Google which page to index and rank in search results, and helps avoid confusion and potential issues with duplicate content.
Once you have added the rel="canonical" link element to all of your pages with similar or duplicate content, you can use Google Search Console to test the URLs and make sure that the canonical version is being recognized correctly. This can help ensure that your pages are being indexed and ranked correctly by Google.