An access log is a text file which contains a full report on all the files accessed by your site visitors. All the files which were requested in one way or another will be included, so when you have a PHP script application and a site visitor opens only the home page, for example, you may find a lot of files in the log. The reason is that there are components on the home page that are embedded - parts of other pages, pictures, etc. All of these files shall be listed inside the access log, so that you can get a detailed picture of the way your Internet site functions. The information is in plain text format, so the logs are sometimes referred to as "raw data" as well. An access log contains the name of each requested file, the path to it, the date it was accessed, and also the user’s IP address, web browser and Operating System. More information, including the referrer website, is oftentimes provided too. A log file can be processed by various desktop applications for statistical purposes as an addition to the web statistics created by your hosting server.