Unlike some years ago when Internet sites were almost exclusively static, the standard nowadays is to have a feature-rich, dynamic web site. Few people can build such a web site from scratch though, hence the simplest solution to have a dynamic site is to use a script application. A lot of website hosting companies offer script installers which can be used to add this type of an application for each of your domain name or subdomains, so you will not need to add anything manually. The benefit of using an installer tool is that the scripts are ready to use in a couple of minutes and the copy that'll be installed is already with the settings necessary for it to run adequately on the specific hosting web server, so you'll not have to modify any script or account settings. This way you can easily create one with only a few mouse clicks even if you have never had an Internet site before.