An access log features a record of all the files that have been requested by the visitors while exploring your site. The list is comprehensive, so in case you have a webpage with two embedded images, for instance, all of the three files shall be in the log, not just the page. An access log typically features the date, the Operating System, the web browser and the IP address for each and every file in human-readable form, so you can get a good idea about the most well liked files on your website. The log, that is also commonly named "raw data", is an addition to the web stats that you usually get with a hosting account, not a substitute. A good example why you may need this sort of a log is if you would like to use some software on your computer to prepare a report about the website’s general performance, but you don't want to use the typical graphs and tables that come with the server-generated site stats.