If your website can be access both way with and without www. So may search engines consider same content with two different URLs with and without www. So it might be a case of Duplicate Content as well as Google Canonical problems. So you must stick your domain name accessible either with www or without www. Before writing this rules in .htaccess , make sure that your mod_rewrite is enabled(On). Most probably mod_rewrite is enabled in Linux server but for windows server you need to contact hosting people to make mod_rewrite enabled. You can check this by looking in phpinfo(). How to redirect www to non-www and non-www to www URL using .htaccess redirect Redirect www to non-www: [sourcecode language="plain"] RewriteEngine On RewriteBase / RewriteCond %{HTTP_HOST} ^www.justwebdevelopment.com [NC] RewriteRule ^(.*)$…