Unlike some years ago when websites were almost exclusively static, the standard these days is to have a feature-rich, dynamic website. Not many people can create such a site completely from scratch though, therefore the handiest solution to have a dynamic website is to use a script app. A lot of hosting companies offer script installers that can be used to add this kind of an application for each of your domain name or subdomains, so you'll not have to add anything manually. The advantage of using an installer tool would be that the scripts are ready to use in a few minutes and the copy that'll be set up is already with the settings necessary for it to run properly on the specific hosting server, so you'll not need to change any script or account settings. That way you can quickly create one with simply a couple of mouse clicks even if you have never had a website before.