Unlike some years back when sites were almost exclusively static, the standard currently is to have a feature-rich, dynamic site. Not many people can create this type of web site from scratch though, hence the simplest solution to have a dynamic site is to use a script application. Lots of hosting service providers offer script installers which can be used to add such an application for each of your domain name or subdomains, so you'll not need to set up anything manually. The advantage of using an installer tool would be that the scripts are available to use in just a couple of minutes and the copy which will be installed is already with the settings required for it to run properly on the specific hosting server, so you will not have to change any script or account settings. That way you can easily build one with simply a few mouse clicks even though you may have never had a site before.