Unlike some years ago when sites were almost exclusively static, the standard these days is to have a feature-rich, dynamic web site. Not many people can create such a web site completely from scratch though, therefore the most convenient solution to have a dynamic website is to use a script app. A lot of website hosting service providers offer script installers that can be used to add such an app for each of your domain or subdomains, so you'll not need to set up anything manually. The advantage of using an installer tool would be that the scripts are available to use within a few minutes and the copy that will be installed is already with the settings needed for it to run adequately on the particular hosting server, so you will not have to change any script or account settings. In this way you can easily create one with only a few mouse clicks even when you have never had a website before.