An access log is a comprehensive list of all the files that were accessed by the visitors of a given site. Any file that was requested in some way will be listed, so if you have just one webpage with 3 embedded images, one video and one embedded text file, for instance, the access log will contain a total of six entries - one for any of the six files which were accessed when the website visitor opened the page. A log typically offers the file name and path, the date, in addition to the visitor’s Operating System, web browser and IP address. Oftentimes you could also find the referrer sites that sent the visitors to your website. The data which an access log file provides is in human-readable plain text format. It can be processed by special software on a desktop machine and used to prepare reports on the efficiency of an Internet site, aside from the web statistics which your hosting server may have generated.