VIP-Concepts wrote:
Not so sure about the canonical tag, since on the server only one page exists.
Things on the web are available through both "www" and non "www" urls, so the idea of canonical urls is to force that one is used and the other is not. If they visit the site by way of the non-used one, htaccess redirects will force them to see the one you want to use.
Here's a post on how to force one or the other:
http://www.rockettheme.com/forum/index.php?f=92&t=46753&rb_v=viewtopic#p243473
After setting this up, you'll slowly see the non-used one drop off of your stats.
The plugin listed might be old. I prefer to use the code way and not the plugin.