Unlike some years back when sites were almost exclusively static, the standard today is to have a feature-rich, dynamic Internet site. Few people can build this kind of web site completely from scratch though, therefore the simplest solution to have a dynamic site is to use a script app. Many hosting service providers offer script installers which you can use to add this sort of an app for any of your domain or subdomains, so you will not have to add anything manually. The main advantage of using an installer tool is the fact that the scripts are available to use within a couple of minutes and the copy that will be installed is already with the settings necessary for it to run correctly on the particular hosting server, so you'll not have to adjust any script or account settings. That way you can quickly create one with just a couple of mouse clicks even when you have never had a website before.