An access log includes a record of all of the files which have been requested by the visitors while browsing your website. The list is detailed, so if you have a page with two embedded images, for instance, all of the three files will be in the log, not only the page. An access log normally 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 an idea about the most well liked files on your website. The log, that's also commonly called "raw data", is an addition to the web stats that you commonly get with a hosting account, not an alternative. A good example why you may require this type of a log is if you intend to use some software on your personal computer to prepare a report about the website’s efficiency, but you don't want to use the regular graphs and tables which come with the server-generated site stats.