Unlike some years ago when sites were almost exclusively static, the standard currently is to have a feature-rich, dynamic site. Few people can build such a site completely from scratch though, so the handiest solution to have a dynamic site is to use a script app. A lot of website hosting service providers offer script installers which you can use to add this kind of an app for each of your domain or subdomains, so you will not have to add anything manually. The advantage of using an installer tool is the fact that the scripts are ready to use within a couple of minutes and the copy that will be set up is already with the settings necessary for it to run properly on the specific hosting server, so you'll not have to modify any script or account settings. In this way you can effortlessly build one with just a couple of mouse clicks even though you may have never had a website before.