Unlike some years back when sites were almost exclusively static, the standard currently is to have a feature-rich, dynamic web site. Not many people can create this sort of web site completely from scratch though, hence the simplest solution to have a dynamic website is to use a script application. A lot of web hosting companies offer script installers you can use to add this sort of an application for any of your domain or subdomains, so you'll not have to set up anything manually. The best thing about using an installer tool would be that the scripts are ready to use within a couple of minutes and the copy that will be set up is already with the settings necessary for it to run correctly on the specific hosting server, so you will not have to alter any script or account settings. This way you can quickly build one with only a few clicks even though you may have never had a site before.