Unlike some years ago when websites were almost exclusively static, the standard today is to have a feature-rich, dynamic website. Not everybody can create this type of web site from scratch though, hence the most convenient solution to have a dynamic site is to use a script app. A lot of web hosting companies offer script installers that can be used to add such an app for any of your domain or subdomains, so you'll not have to set up anything manually. The key advantage of using an installer tool would be that the scripts are available to use within 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 server, so you'll not need to adjust any script or account settings. That way you can easily create one with simply a couple of mouse clicks even though you may have never had a website before.