An access log is a comprehensive list of all the files that were accessed by the visitors of a given website. Each and every file which was requested in some way shall be listed, so if you have only one webpage with three embedded pictures, one video and one embedded text file, for instance, the access log shall contain a total of 6 entries - one for any of the 6 files which were accessed when the visitor opened the webpage. A log typically contains the file name and path, the date, plus the visitor’s Operating System, web browser and IP address. Sometimes you could also find the referrer Internet sites that sent the visitors to your site. The info that an access log file provides is in human-readable plain text format. It can be processed by special software on a laptop or computer and used to prepare reports on the efficiency of a site, besides the web stats your server may have generated.