Unlike some years ago when web sites were almost exclusively static, the standard nowadays is to have a feature-rich, dynamic website. Not everybody can create this kind of website from scratch though, hence the simplest solution to have a dynamic website is to use a script application. Lots of website hosting service providers offer script installers which you can use to add such 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 the fact that the scripts are available to use in a few minutes and the copy that will be installed is already with the settings necessary for it to run correctly on the particular hosting server, so you'll not have to adjust any script or account settings. This way you can easily create one with simply a few clicks even if you have never had a website before.