Unlike some years ago when web sites were almost exclusively static, the standard today is to have a feature-rich, dynamic site. Not many people can create this kind of web site completely from scratch though, so the simplest solution to have a dynamic site is to use a script application. Lots of website hosting companies offer script installers which you can use to add this kind of an application for each of your domain 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 within a couple of minutes and the copy that'll be installed is already with the settings required for it to run correctly on the specific hosting web server, so you will not have to change any script or account settings. That way you can quickly create one with only a few mouse clicks even though you may have never had an Internet site before.