Welcome to the Q&A Forum

Hello.  We'll need to see what it's telling you so we can help.  Can you share a screenshot of the issue?  We'll be happy to look at it and give advice. Just an FYI, just because a canonical tag exists on the page, doesn't mean there aren't issues.  So once we see what the issue is telling you, we can help you figure it out.

Hi, Can you give me clear explanation with one correct canonical example that how to use