Awstats – Awstats is a great web site tracking system. It will give very useful information about any site on the main account. More information on Awstats can be found here: Awstats Explained
Sub-domain Stats – This will display useful all the statistics available for any sub-domain name on the account.
Latest Visitors – This will display the last 300 visitors to the site and also where they went on the site. This information is useful for tracking users that may have accessed portions of a site they weren't allowed to access.
Bandwidth – This will display all the traffic for the site in a nice graphical display.
Error Log – This information is vital to any website running correctly. Users can view which files are missing on their account and replace them accordingly, or update any pages that need to be updated.