Unlike some years ago when Internet sites were almost exclusively static, the standard these days is to have a feature-rich, dynamic web site. Not everybody can build such a website completely from scratch though, hence the most convenient solution to have a dynamic website is to use a script application. Many website hosting companies offer script installers you can use to add this sort of an app for any of your domain or subdomains, so you'll not have to set up anything manually. The key advantage of using an installer tool would be that the scripts are ready to use in a few minutes and the copy that will be installed is already with the settings necessary for it to run the way it should on the particular hosting server, so you will not have to adjust any script or account settings. In this way you can quickly create one with simply a couple of clicks even when you have never had an Internet site before.