Unlike some years ago when websites were almost exclusively static, the standard these days is to have a feature-rich, dynamic site. Few people can build such a website from scratch though, so the simplest solution to have a dynamic site is to use a script application. Many hosting companies offer script installers that you can use to add such an application for each of your domain name or subdomains, so you'll not have to set up anything manually. The benefit of using an installer tool is the fact that the scripts are available to use in a few minutes and the copy that'll be set up is already with the settings needed for it to run the way it should on the particular hosting server, so you'll not have to adjust any script or account settings. That way you can quickly build one with just a couple of mouse clicks even if you have never had a website before.