An error log is a list of the error messages and warnings which displayed for one reason or another while your visitors were looking through your site. This type of a log includes raw info on the way the hosting server has addressed requests in various situations. An error message could appear if, for example, a link leads to a site or a file that's not on the hosting server, if the code on a given page can't be processed, if somebody is trying to access the Internet site or its back office through an IP address which is blocked by an .htaccess rule and many others. The information inside the error log features the IP of the visitor, what error message appeared and the cause for the server to display it, the full path to the file that generated the error and the specific time of the event. Having this information will help you determine if any part of your site has a problem, which you may then clear up. Consequently, your website visitors will have a better experience and you may boost the site for optimum performance.