Unlike some years ago when sites were almost exclusively static, the standard these days is to have a feature-rich, dynamic site. Not everybody can create this sort of site completely from scratch though, hence the simplest solution to have a dynamic website is to use a script application. Many web hosting companies offer script installers that can be used to add this kind of an application for each of your domain or subdomains, so you'll not need to add anything manually. The key advantage of using an installer tool is the fact that the scripts are ready to use in just a couple of minutes and the copy that'll be installed is already with the settings necessary for it to run adequately on the specific hosting web server, so you will not have to adjust any script or account settings. That way you can effortlessly create one with simply a few mouse clicks even though you may have never had a site before.