Unlike some years ago when sites were almost exclusively static, the standard today is to have a feature-rich, dynamic site. Not everybody can build such a website completely from scratch though, therefore the most convenient solution to have a dynamic website is to use a script app. A lot of web hosting service providers offer script installers which you can use to add this sort of an application for each of your domain name or subdomains, so you will not have to set up anything manually. The main benefit of using an installer tool would be that the scripts are ready to use in just a couple of minutes and the copy which will be set up is already with the settings needed for it to run efficiently on the specific hosting web server, so you will not need to alter any script or account settings. That way you can easily build one with simply a few clicks even if you have never had a site before.