An error log is a list of the error messages and warnings which appeared for one reason or another while your visitors were browsing your Internet site. Such a log includes raw info about the way the web server has dealt with requests a number of situations. An error message may appear if, for example, a link leads to a site or a file that's not on the server, if the code on a specific page cannot be processed, if any individual is trying to access the site or its back office via an IP address that's blocked by an .htaccess rule etc. The information inside the error log offers the IP of the website visitor, what error message showed up and the basis for the server to show it, the whole path to the file which induced the error and the precise time of the event. Having this info will allow you to determine if any part of your Internet site has a problem, which you could then resolve. Consequently, your site visitors will have a better experience and you may supercharge the Internet site for maximum performance.