Unlike some years back when websites were almost exclusively static, the standard currently is to have a feature-rich, dynamic website. Not everybody can create this type of site completely from scratch though, hence the simplest solution to have a dynamic website is to use a script app. Lots of website hosting companies offer script installers which you can use to add such an app for each of your domain name 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 ready to use in a few minutes and the copy that will be set up is already with the settings necessary for it to run the way it should on the specific hosting server, so you will not have to adjust any script or account settings. In this way you can quickly build one with just a few mouse clicks even when you have never had an Internet site before.