Unlike some years back when web sites were almost exclusively static, the standard nowadays is to have a feature-rich, dynamic website. Not many people can create this kind of web site from scratch though, therefore the handiest solution to have a dynamic site is to use a script app. Many web hosting providers offer script installers that can be used to add this kind of an application for any of your domain or subdomains, so you'll not have to add anything manually. The main benefit of using an installer tool would be that the scripts are available to use in a few minutes and the copy that will be installed is already with the settings required for it to run correctly on the specific hosting web server, so you will not need to change any script or account settings. In this way you can quickly build one with just a few mouse clicks even though you may have never had a website before.