html link rel canonical

This pages have the same or almost the same content:

  • www.site.com/?page_id=7 - canonical page;
  • www.site.com/?page_id=7&print=1 - print version of the page;
  • www.site.com/?page_id=7&page_comments=2 - version of the page with second comments page;
  • www.site.com/?page_id=7&hide_comments=1 - version of the page without comments;

If you want to avoid search engines (like Google) scan duplicate content and showing in search results only original content you may add to duplicate pages this code into head section:

<head>
<link rel="canonical" href="http://www.example.com/?page_id=7" />
</head>

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