Unlike some years ago when web sites were almost exclusively static, the standard currently is to have a feature-rich, dynamic website. Not many people can build this kind of website completely from scratch though, therefore the simplest solution to have a dynamic site is to use a script application. Many hosting companies offer script installers you can use to add this type of an application for each of your domain or subdomains, so you will not need to install anything manually. The main benefit of using an installer tool is that the scripts are available to use in a couple of minutes and the copy which will be installed is already with the settings required for it to run the way it should on the specific hosting web server, so you will not need to modify any script or account settings. That way you can quickly build one with only a couple of clicks even when you have never had an Internet site before.