Don't Catch Yourself in a Duplicate Content Penalty

Did you know that Google will penalize your site if they think your have multiple domains containing the same content?

There is an easy fix for mistaken duplicate content. First, you need to be sure your site does not have multiple URLs pointing to the same domain. Google will penalize your rankings if they see two exact sites pointing to the same URL. For example; Google’s views the URL http://www.yoursite.com and yoursite.com as two separate URLs which can get your site penalized for duplicate content.

To easily fix this you can manipulate your .htaccess file and redirect all domains to your main URL. This will automatically redirect any address to the main URL.

Second, you can add the following code to your .htaccess file
(change the "yoursite" to your domain):
RewriteEngine on
RewriteCond %{HTTP_HOST} ^yoursite.com
RewriteRule ^(.*)$ http://www.yoursite.com/$1 [R=permanent,L]

Easy as that and you are back in Google's good graces!