Unlike some years back when Internet sites were almost exclusively static, the standard currently is to have a feature-rich, dynamic website. Few people can build this sort of website from scratch though, therefore the simplest solution to have a dynamic site is to use a script app. A lot of hosting companies offer script installers that you can use to add such an application for any of your domain name or subdomains, so you'll not need to install anything manually. The advantage of using an installer tool is that the scripts are available to use in just a few minutes and the copy which will be installed is already with the settings required for it to run adequately on the particular hosting server, so you'll not need to modify any script or account settings. That way you can quickly build one with just a few clicks even though you may have never had a site before.