Each server typically has many URL's, each referring to a different file or page on the server. The URLs are normally arranged in a hierarchic structure whose topmost level is described as the Home Page. A page normally is made up of multiple files, usually text with embedded graphic files. Additionally pages contain links to other URLs on either that server or any other server on the Web. In this document, they present several definitions which will help in the following discussion.
Many organizations measure audience size by the number of entries to the Web server log.
Because there may be many files on a page, the page count will almost always be less than the hit count. A visitor count will increase by one only when a user enters the site and not as the user browses through the site pages. This idea is important because a user can visit a site many times in a short time period, thus inflating counts for the previous three measures. An additional standard marketing measure, frequency , can be derived by dividing visits by users. Given their data driven orientation and the current log software available, many Web sites continue to use hits as a way to describe audience measurement.