SEO is one of my biggest hobbies and one of the easiest things to fix when starting to optimize a domain is the canonical tag. One problem people see often is that Google has to treat www.example.com and example.com as 2 different domains… for most of the Internet they point to the same location, but they could be different. The problem for SEO comes when you start earning links to your domain because they can actually start to fight each other as the links profiles grow on the www and non www versions so thats where the canonical tag comes in. Google announced the canonical tag awhile ago, but many developers still dont know about it or use it.
Here’s the tag you add to your <head> it can go on as many pages as you like as long as the copy is the same
<link rel="canonical" href="http://www.example.com/product.php?item=swedish-fish" />
The advantage is after adding this little tag to all the pages on you domain Google will know that they can treat the www and non www versions of your domain as the same thing. But if you havent added it at launch one version of your domain may have already earned more “link power” (authority) than the other and thats where the BE Canonical tool comes in… it will use the SeoMoz API to pull link metrics for the www and nonwww versions of the domain and tell you which one you should use as you canonical domain based on the authority that has already been built to the pages
Find out what your canonical domain should be
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