An access log features a record of all files which have been requested by the visitors while browsing your Internet site. The list is detailed, so when you have a page with 2 embedded images, for example, all of the three files will be in the log, not just the page. An access log usually features the date, the OS, the Internet browser and the IP address for each file in human-readable form, so you can get a good idea about the most well liked files on your Internet site. The log, which is also often named "raw data", is an addition to the web statistics which you commonly get with a hosting account, not an alternative. An example why you might need this sort of a log is if you intend to use some software on your personal computer to prepare a report about the website’s overall performance, but you do not want to use the regular graphs and tables which come with the server-generated website stats.