Unlike some years ago when sites were almost exclusively static, the standard today is to have a feature-rich, dynamic site. Few people can create this kind of web site from scratch though, therefore the handiest solution to have a dynamic site is to use a script application. Lots of hosting providers offer script installers which can be used to add this kind of an app for each of your domain or subdomains, so you'll not need to install anything manually. The main advantage of using an installer tool would be 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 correctly on the specific hosting web server, so you will not have to modify any script or account settings. This way you can effortlessly build one with just a few clicks even if you have never had an Internet site before.