Unlike some years ago when sites were almost exclusively static, the standard these days is to have a feature-rich, dynamic website. Not everybody can build this kind of website from scratch though, therefore the handiest solution to have a dynamic site is to use a script app. Many website hosting companies offer script installers that you can use to add this type of 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 that the scripts are ready to use in a couple of minutes and the copy which will be set up is already with the settings required for it to run correctly on the specific hosting web server, so you'll not need to alter any script or account settings. This way you can quickly build one with only a couple of mouse clicks even when you have never had a site before.