Unlike some years ago when web sites were almost exclusively static, the standard nowadays is to have a feature-rich, dynamic site. Few people can create this sort of web site completely from scratch though, therefore the most convenient solution to have a dynamic website is to use a script app. Many website hosting service providers offer script installers which you can use to add such an app for any of your domain name or subdomains, so you will not have to add anything manually. The best thing about using an installer tool is that the scripts are available to use within a few minutes and the copy that'll be installed is already with the settings needed for it to run properly on the specific hosting web server, so you will not need to modify any script or account settings. This way you can easily create one with just a couple of clicks even if you have never had a website before.