December 8th, 2011, 05:36 AM
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any visitor are open your website without www. , in this cases search engine automatically open your site with www.
December 4th, 2012, 01:03 AM
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Originally Posted by steveschmidt85
www.xyz.com
xyz.com
www.xyz.com/index.html
As per user all these URLs are same but google consider all these pages as different pages with same content and it can cause duplicate content issue it is called canonical issue
Nice answer but he does not answer where and how to use this canonical tag
If we have multiple pages with same contents then give reference of the original page in duplicate page by canonical url tag.