I think I found a solution, to edit my .htaccess file, does this look correct to you guys?
Redirecting YourSite.com to http://www.YourSite.com
If search engines find both www and non-www links from other sites to your site, they may treat http://YourSite.com and http://www.YourSite.com as two different websites with the same content. This means that your site can be penalized for duplicate content.
Many experts recommend to set up a 301 redirect (permanent redirect) from YourSite.com to http://www.YourSite.com…
RewriteEngine On
RewriteCond %{HTTP_HOST} ^YourSite.com [nc]
RewriteRule (.*) http://www.YourSite.com/$1 [R=301,L]
Replace “YourSite.com” with your real domain name.