www or non www version this is almost everyday asked in various forums. We will share a story behind www or non www version of webpages.
This debate on whether we will use www or non www version for our webpages, this debate probably started in late 2003; when a dedicated website named no-www appeared, which promotes not using the www version.
www or non www version : The story went on
Actually, no-www is basically a non-profit website. There is no single advertisement on their website. They have a “Get Validated” tool, which is actually a good tool to check whether your redirection is working properly. They have a directory too based on their criteria to classify www or non www version of websites. All websites, whether www or non www version falls in to three classes : A, B & C.
The debate whether to use www or non www version reached the ultimate position when 
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Like no www these are non profit websites too with Extra www offered another classification system for www or non www versions of the websites.
It seems their funny, witty war became silent after 2005 on www or non www version of websites. All these three websites must be appreciated for their efforts without any monetary gain.
www or non www version Version : Which are actually needed to know for SEO
No SEO expert today thinks that www or non www version has any effect over another.
It must be remembered that what server must be properly configured and both URLs (www or non www version) should point to a single site. Remember to define “Preferred Domain” in Google Webmaster Tools.
www or non www version of website is really not an important thing, but rather configure properly the both version as said above to avoid being penalized for having a duplicate content by Google. Google takes www or non www version as two different websites, because : we use the non www version, thecustomizewindows (dot) com; if we create a sub domain named www, then www (dot) thecustomizewindows (dot) com will be a different website.
The use of www or non www version is your choice.
