Not just that, you want to know what countries they are from, how long they look at your pages, how often they come back, and how they found your site in the first place. After the first few months you also want to know how much bandwidth you are using, so you will know when to upgrade your internet connection. You want to find bad links on your own pages so you can fix them and bad links into your site from outside so you can ask other people to fix them. You want to know when the server was crashed over the weekend, and what keywords people are using at the search engines to find your site. Business is booming, you need to know which ad campaign was responsible, which pages cause people to leave, which movie file is tying up all your bandwidth, and what browsers your visitors are running.
Web servers write log files.
The log file contains a list of every request made to your web site. Its full of hidden information and its also huge and totally boring. Summary processes that log file and extracts the answers to your questions, which you can view with any web browser. You have a lot of questions, Summary has a lot of answers. There are almost 70 different reports to choose from.