When the plugin is finished, there will be three ways to implement webstats, using the php backend on a webserver, using the php backend with the minecraft server acting as a interface to your database, and the last option, letting your minecraft server be the webserver. So far only the php backend has been implemented.
Option 1: PHP backend on a webserver
This option requires that you have a webserver and that your sql database is accessible to this webserver. Copy the webstats folder to your webserver ftp. once its up on your site, edit the db_con.php file to match your sql settings on your server. Once finished goto the page and you should see your webstats.