Have you ever noticed that when you type in www.twitter.com in the address bar, after Twitter loads, it will be changed to http://twitter.com ? In the same way, if you type in bbc.co.uk in address bar, after BBC gets loaded, the URL will be http://www.bbc.co.uk . If you try to browse to microsoft.com you will get an entirely different URL in the form: "http://www.microsoft.com/en/us/default.aspx" . You find that certain websites strip off your 'www' prefix, while certain others add it. Yet another set of websites redirect you to entirely different looking URLs. In this post, we will see more about this aspect of search engine optimization, called URL canonicalization or URL normalization. We will see why it is important and why being knowledgeable about it will reduce duplicate content issues . Need for Canonicalization As you have seen above, the following URLs may all be the same in terms of content: http://website.com http://www.website.com/index.html h...
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