Unlike some years ago when websites were almost exclusively static, the standard nowadays is to have a feature-rich, dynamic website. Not everybody can build such a web site completely from scratch though, so the most convenient solution to have a dynamic site is to use a script app. Many web hosting providers offer script installers that you can use to add this kind of an application for any of your domain name or subdomains, so you will not need to install anything manually. The best thing about using an installer tool would be that the scripts are ready to use within a couple of minutes and the copy that will be installed is already with the settings needed for it to run properly on the particular hosting server, so you'll not need to adjust any script or account settings. That way you can effortlessly build one with simply a few clicks even if you have never had a site before.