What is Canonical Error?
When your home page opens with both "http://www.site.com" and "http://site.com" is known as canonical error. Sometime Canonical URL (best URL version) is also referred as "Preferred Domain".
Canonicalization (Methods to set this problem)
1. Set your preferred domain (using webmaster tool)
2. Specify the canonical link for each version of the page
For Example:
link rel="canonical" href="http://www.canonical.com"
Add this extra information to the section of non-canonical URLs.
3. Indicate your canonical (preferred) URLs by including them in a Sitemap
4. Indicate how you would like Google to handle dynamic parameters. (by using Parameter Handling)
Source: Google Webmaster Central
When your home page opens with both "http://www.site.com" and "http://site.com" is known as canonical error. Sometime Canonical URL (best URL version) is also referred as "Preferred Domain".
Canonicalization (Methods to set this problem)
1. Set your preferred domain (using webmaster tool)
2. Specify the canonical link for each version of the page
For Example:
link rel="canonical" href="http://www.canonical.com"
Add this extra information to the section of non-canonical URLs.
3. Indicate your canonical (preferred) URLs by including them in a Sitemap
4. Indicate how you would like Google to handle dynamic parameters. (by using Parameter Handling)
Source: Google Webmaster Central
