An access log is a text file that contains an extensive list of all the files accessed by your website visitors. All the files that were requested in one way or another will be included, so if you have a PHP script program and a website visitor opens just the home page, for example, you may find plenty of files in the log. It is because there are components on the home page which are embedded - parts of other web pages, images, and so forth. All of these files will be listed within the access log, allowing you to get a complete picture of the way your Internet site works. The info is in plain text format, so the logs are often described as "raw data" as well. An access log shows the name of every requested file, the path to it, the date it was accessed, along with the user’s IP address, world-wide web browser and OS. More information, such as the referrer Internet site, is sometimes supplied too. A log file may be processed by various desktop applications for statistical purposes as an addition to the web statistics provided by your hosting server.