Each of you reading this book is going to have a different acquired skillset and level of experience with the Windows Server environment. As I mentioned previously, being able to make servers run the operating system is great and a very important first step for doing real work in your environment. But until you know and understand what the purposes behind the main roles available to run on Windows Server 2019 are, the only thing your new server does is consume electricity.
A server is intended to serve data. The kinds of data that it serves and to what purpose depends entirely on what roles you determine the server must ... well ... serve. Appropriately, you must install roles within Windows Server 2019 to make it do something. We already know how to get roles installed onto our server, but have not talked about any of the purposes behind these roles...