What is the difference between 'HITS' and 'FILES'?
HITS is the total number of HTTP requests that the server received during the reporting period. Any request made to the server is considered a hit. FILES is the number of hits that actually resulted in something being sent back to the user, such as an HTML page or image.

Why don't the daily visit totals add up to the monthly total?
You cannot add up the daily visit totals and compare them to the monthly total, they are different reporting periods. For example, if someone visits your site at 11:45pm and stays until 12:15am, the monthly total would show one visit, while the daily totals will show two (one for each day).

Visits
Whenever a request is made to the server from a given IP address (site), the amount of time since a previous request by the address is calculated (if any). If the time difference is greater than a pre-configured 'visit timeout' value (or has never made a request before), it is considered a 'new visit'.

KBytes
The KBytes (kilobytes) value shows the amount of data, in KB, that was sent out by the server during the specified reporting period.

Note: A kilobyte is 1024 bytes

Sites
Each request made to the server comes from a unique 'site', which can be referenced by a name or ultimately, an IP address. The 'sites' number shows how many unique IP addresses made requests to the server during the reporting time period.

Pages
Pages are, well, pages! Generally, any HTML document, or anything that generates an HTML document, would be considered a page. This does not include the other stuff that goes into a document, such as graphic images, audio clips, etc... This number represents the number of 'pages' requested only, and does not include the other 'stuff' that is in the page. What actually constitutes a 'page' can vary from server to server. The default action is to treat anything with the extension '.htm', '.html' or '.cgi' as a page.

Top Entry and Exit Pages
The Top Entry and Exit tables give a rough estimate of what URL's are used to enter your site, and what the last pages viewed are.

User Agents
Type of browsers that clients are using to access the site.