An access log includes a record of all the files which have been requested by the visitors while exploring your website. The list is comprehensive, so in case you have a web page with 2 embedded images, for example, all of the three files will be in the log, not only the page. An access log typically includes the date, the Operating System, the Internet browser and the IP address for each file in human-readable form, so you can get an idea about the most popular files on your Internet site. The log, that is also frequently called "raw data", is an addition to the web statistics you commonly get with a hosting account, not an alternative. An example why you might need this type of a log is if you wish to use some software on your PC to prepare a report about the website’s efficiency, but you do not want to use the conventional graphs and tables which come with the server-generated website statistics.