Unlike some years ago when sites were almost exclusively static, the standard today is to have a feature-rich, dynamic site. Not many people can build this kind of web site completely from scratch though, hence the handiest solution to have a dynamic site is to use a script app. Many website hosting service providers offer script installers you can use to add such an app for any of your domain or subdomains, so you'll not need to install anything manually. The best thing about using an installer tool would be that the scripts are available to use in just a couple of minutes and the copy that'll be installed is already with the settings necessary for it to run adequately on the particular hosting server, so you will not need to alter any script or account settings. That way you can effortlessly build one with simply a couple of clicks even when you have never had a site before.