Hits - Any file which is downloaded from your server to a user's machine. This include images, Web content, animation, css files, and downloaded content such as pdfs, Word documents, and Excel files. Hits can be accessed at IT Reports-->Hits & Byes Tracking.
Page views - A page view includes all hits except for the following file types:
If you would like to add to or remove from the list of exclusions for your profile, send a request to firstname.lastname@example.org.
The page views are available under Marketing Optimization-->Unique Visitor Tracking-->Visits & Pageview Tracking.
Referrers - In order for your site to track referrers, you need to be sure your logs record referrers. Information on doing this can be found at the Urchin support site. Referrer reports are available under Marketing Optimization-->Visitor Segment Performance-->Referring Source.
Changing date range - By default, your reports will show the last week for which data is available. You can change the data range by clicking the "enter range" link, selecting the appropriate range, then clicking "Apply range."