Unlike some years ago when Internet sites were almost exclusively static, the standard these days is to have a feature-rich, dynamic website. Not everybody can create such a site completely from scratch though, so the simplest solution to have a dynamic website is to use a script app. A lot of website hosting companies offer script installers that can be used to add this sort of an app for each of your domain or subdomains, so you'll not need to install anything manually. The best thing about using an installer tool is the fact that the scripts are available to use in a few minutes and the copy that'll be set up is already with the settings needed for it to run the way it should on the particular hosting server, so you'll not have to alter any script or account settings. In this way you can easily create one with just a few mouse clicks even if you have never had a site before.