Unlike some years ago when sites were almost exclusively static, the standard currently is to have a feature-rich, dynamic website. Not everybody can create this sort of web site completely from scratch though, hence the simplest solution to have a dynamic site is to use a script app. A lot of web hosting service providers offer script installers which can be used to add this type of an app for any of your domain or subdomains, so you'll not need to set up anything manually. The advantage of using an installer tool is that the scripts are available to use in just a couple of minutes and the copy that will be set up is already with the settings needed for it to run correctly on the specific hosting web server, so you'll not need to change any script or account settings. This way you can easily build one with just a couple of mouse clicks even though you may have never had a site before.