Unlike some years ago when Internet sites were almost exclusively static, the standard these days is to have a feature-rich, dynamic website. Not everybody can build such a website completely from scratch though, hence the handiest solution to have a dynamic website is to use a script application. Many hosting service providers offer script installers you can use to add such an application for any of your domain name or subdomains, so you'll not need to add anything manually. The key advantage of using an installer tool is that the scripts are ready to use in a few minutes and the copy which will be installed is already with the settings needed for it to run adequately on the particular hosting server, so you will not need to adjust any script or account settings. That way you can quickly build one with just a few clicks even when you have never had an Internet site before.