Unlike some years back when websites were almost exclusively static, the standard today is to have a feature-rich, dynamic web site. Not many people can create this sort of web site completely from scratch though, so the simplest solution to have a dynamic site is to use a script app. Lots of hosting providers offer script installers which can be used to add this kind of an application for each of your domain or subdomains, so you will not have to set up anything manually. The main benefit of using an installer tool is the fact that the scripts are available to use within a couple of minutes and the copy that'll be set up is already with the settings needed for it to run efficiently on the particular hosting server, so you'll not need to adjust any script or account settings. In this way you can quickly build one with simply a few mouse clicks even when you have never had a site before.