When your business grows the load of your website, web applications, server grows too. Besides, usually as time goes by the structure of your web site becomes more and more complicated and branched. So the possibility of any errors and fails increases. There some services and software which are assigned to find, monitor and test such facts as website performing under certain loads, a number of users can handle your website, bottlenecks and so on. Such web load stress test tools simulate real user’s activity by using remote agents. As an end-user you setup the conditions for the web site or web application you would like to stress test.