Unlike some years ago when Internet sites were almost exclusively static, the standard nowadays is to have a feature-rich, dynamic site. Not everybody can build this type of web site completely from scratch though, hence the simplest solution to have a dynamic website is to use a script app. Lots of web hosting providers offer script installers that you can use to add this sort of an application for each of your domain or subdomains, so you will not need to set up anything manually. The main 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 will be installed is already with the settings needed for it to run properly on the specific hosting web server, so you'll not have to modify any script or account settings. That way you can easily build one with just a few clicks even if you have never had a website before.