definition of each of the terms used is as follows:
A hit is every time someone has requested something from your site,
be it a page of HTML, an image, the output of a CGI script or something
else. Every valid line in the server log is counted as a hit. A hit
is NOT the number of visitors to the site as is often mistakenly
The number of times the server has sent something back to the browser,
regardless of what it is, such as a HTML page or image. This is distinct
from hits in that not all requests may cause something to be served,
so hits can be greater than files.
Pages are any HTML documents, either static or generated from a Perl
script or similar. This does not count images, for example.
A single visit is when a site has requested one or more pages (see
above) from your website with less than a certain amount of time
elapsing between hits. That is, a series of pages viewed from the
same site with no more than 30 minutes between any two, or else
just a single page request from a single site. The is the best
way to determine the actual number of site viewers.
The number of different client (viewer) IP addresses where requests
for pages/files/hits have come from. This DOES NOT mean the number
of actual, physical people that have visited, just IP addresses.
The cumulative total size of the data sent as a result of all hits.