WWW in Domains by semreach.com

You can access many sites with or without the “www” in front of the network name. You may have noticed that for SEM Reach, you can use www.semreach.com but if you use semreach.com, if redirects to www.semreach.com. Why? How does all this relate to SEO?
Components of a URL
Your URL (uniform resource locator) is made of separate parts, and when all collated together, packets of a site get sent to you, displaying a web page or such. Simply, this is what your URL is made of:
Protocol: http://
Host/Hostname: www.semreach.com
Subdomain: www
Network Name: semreach
TLD and/or Extension: .com
Relation to SEO
As you can see, SEM Reach uses all parts, including the subdomain of “www“. Ok, so how does all this relate to SEO? Well, “www.semreach.com” is just like “forums.semreach.com” or “blog.semreach.com“. Its another subdomain from the rest. However, the difference is that “www.semreach.com” is equivalent to “semreach.com” in terms of the content displayed. When you go to Google and search for a domain, you potentially will get two results for that web page. “www” and without “www“. You get two websites and therefore the two websites can rank differently in rankings.
You could get a PR5 for the “www” domain and a PR2 for the one without “www“. Its because people can link to your site with either domains and still get the same result. This has been a factor in the way your site performs where people only look at either of the domains.
How to fix this issue?
Its actually the simplest hacks you could do. Through your .htacess, you are doing a 301 redirect. The two options are:

Redirect domain.com to www.domain.com
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !^www.domain.com$ [NC]
RewriteRule ^(.*)$ http://www.domain.com/$1 [L,R=301]

Redirect www.domain.com to domain.com
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !^domain.com$ [NC]
RewriteRule ^(.*)$ http://domain.com/$1 [L,R=301]

Be sure to change domain.com to your own domain.
Now whatever version you type into your search engine, or whatever others have linked your to, you will always get one result over the other. This can affect your site’s ranking performance over a long period of time.

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