An error log is a listing of the error messages and warnings which displayed for one reason or another while your visitors were surfing around your site. Such a log provides raw info on the way the web server has handled requests in various situations. An error message may appear if, for example, a link leads to a page or a file that's not on the hosting server, if the code on a particular page cannot be processed, if any individual is trying to access the site or its back office via an IP address that is blocked by an .htaccess rule and so forth. The information within the error log features the IP address of the site visitor, what error message showed up and the reason for the web server to show it, the full path to the file that triggered the error and the exact time of the event. Having this info will permit you to determine if any part of your website has a problem, which you could then clear up. For that reason, your website visitors will have a better experience and you'll boost the Internet site for optimum performance.