Here Is Why You Need To Manage Your Canonicals Right

Aug 8, 2012 • 8:31 am | comments (4) by twitter Google+ | Filed Under Google Search Engine Optimization

A Google Webmaster Help thread has one webmaster who is upset that Google lists the site under one domain and has the cache listed under a different domain. What this webmaster finds out is that Google not only has different domains with the same content but tons of different URLs with the same content.

Canonical issues across different domains or within the same domain name can cause many issues for Google and thus your rankings.

Canonicals Issues In Google

Pierre Far from Google shared some other examples, outside of the picture above. He then explained why this is an issue:

When our algorithms are confronted with such large-scale content duplication, they may end up making a canonicalization decision that may not be what you intended. The recommendation, which is also the way to fix this situation, is to have only one URL (called the "canonical URL") serve any bit of content. For example, you may wish to have all the news in German hosted only on the .de domain, the English pages on the .org site, and likewise for the different languages. If you pick the canonical URL, you would be sending a very strong signal to our algorithms about your preferred choice.

Pierre then sums it up with this line:

The key point about your sites' structure is that the multiple domains as you have configured them are, effectively, mirrors of each other, which sends conflicting signals to our algos. You'd need to change the structure such that each page is reachable through one URL (i.e. on one domain) only.

Canonical issues can be handled by Google, but good webmasters make sure it is handled for Google.

Forum discussion at Google Webmaster Help.

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08/08/2012 10:00 pm

Running a site over multiple domains has always seemed counter intuitive to me. Why increase the complexity when a subdomain or even a /german directory would suffice. Having said that I would still canonicalise my content.

Rekha Bisht

08/09/2012 05:30 am

Having same content on different domains or on different pages can create problem as Google will count it two different pages. So canonical tag is required there to tell the robots that these pages are same.

Y. Schwarz

08/10/2012 01:26 am

Sure, there is no reason to handle the same content over more than one domain, as Pierre say (nicely). Just tryng to convince one of our customers not to do it...

Rahul Mishra@SEO|SMO

08/13/2012 08:52 am

Yes..Use .htaccess file and redirect all domain on one. It also helps in SEO.

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