Using web stats you can find out the following info about your websites traffic:
- How many visitors.
- How many hits.
- How they found your site.
- Which Search Engine reffered to your site.
- How much bandwidth is being used.
- Key Words on Search Engines
- plus loads of other information.
You can access your websites stats here http://www.yourdomain.com/plesk-stat/webstat
If you are prompted to login use your FTP details.