Unlike some years back when web sites were almost exclusively static, the standard these days is to have a feature-rich, dynamic web site. Few people can build this type of website completely from scratch though, so the most convenient solution to have a dynamic website is to use a script app. A lot of hosting providers offer script installers you can use to add this kind of an application for any of your domain name or subdomains, so you will not need to install anything manually. The main benefit of using an installer tool would be that the scripts are available to use within a few minutes and the copy that'll be set up is already with the settings necessary for it to run the way it should 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 just a couple of clicks even when you have never had a site before.