Unlike some years back when websites were almost exclusively static, the standard currently is to have a feature-rich, dynamic site. Not many people can create such a web site from scratch though, therefore the most convenient solution to have a dynamic website is to use a script app. A lot of hosting companies offer script installers that you can use to add this type of an application for each of your domain or subdomains, so you will not have to install anything manually. The benefit of using an installer tool is the fact that the scripts are ready to use within a couple of minutes and the copy that'll be set up is already with the settings required for it to run properly on the specific hosting server, so you'll not have to change any script or account settings. That way you can easily build one with simply a few clicks even when you have never had a site before.