An access log contains a record of all files which have been requested by the visitors while exploring your Internet site. The list is thorough, so in case you have a web page with 2 embedded images, for example, all of the three files shall be in the log, not only the page. An access log typically contains the date, the Operating System, the browser and the IP address for every file in human-readable form, so you can get a good idea about the hottest files on your website. The log, which is also often referred to as "raw data", is an addition to the web statistics which you usually get with a hosting account, not a replacement. An illustration why you could need this kind of a log is if you want to use some software on your personal computer to prepare a report about the website’s functionality, but you don't want to use the typical graphs and tables which come with the server-generated site stats.