An access log is a detailed list of all the files which were accessed by the guests of a certain Internet site. Every single file which was requested in some way will be listed, so if you have one page with 3 embedded images, one video and one embedded text file, as an example, the access log shall contain a total of six entries - one for each of the 6 files which were accessed when the visitor opened the page. A log usually contains the file name and path, the date, in addition to the visitor’s OS, worldwide web browser and IP address. In some cases you could also find the referrer websites that sent the visitors to your site. The info which an access log file provides is in human-readable plain text format. It can be processed by special software on a personal computer and used to write reports on the overall performance of an Internet site, besides the web stats your server may have produced.