Unlike some years ago when websites were almost exclusively static, the standard these days is to have a feature-rich, dynamic website. Not many people can create this kind of web site completely from scratch though, hence the simplest solution to have a dynamic website is to use a script app. A lot of hosting service providers offer script installers that can be used to add this kind of an app for each of your domain or subdomains, so you will not need to add anything manually. The advantage of using an installer tool is the fact that the scripts are ready to use in just a few minutes and the copy that will be set up is already with the settings necessary for it to run efficiently on the specific hosting web server, so you'll not need to change any script or account settings. This way you can quickly build one with only a few clicks even when you have never had a website before.