Unlike some years ago when web sites were almost exclusively static, the standard today is to have a feature-rich, dynamic web site. Not everybody can create this sort of website from scratch though, therefore the simplest solution to have a dynamic site is to use a script application. A lot of hosting providers offer script installers you can use to add this type of an app for each of your domain name or subdomains, so you'll not have to set up anything manually. The best thing about using an installer tool is that the scripts are ready to use in a couple of minutes and the copy which will be set up is already with the settings necessary for it to run the way it should on the particular hosting web server, so you will not have to alter any script or account settings. That way you can quickly build one with just a few clicks even when you have never had a site before.