The basic tutorial just gets you started. But because the designers of the stock PowerPoint templates hadn't read the book on how people percieve projected images, the designs have to be modified to work on your screen. Also because PowerPoint is so popular you won't want your slides to look like everyone else's.
This expanded tutorial shows you all the formatting commands. You can even learn how to change an entire slide deck with just one command! And there are step-by-step instructions for a whole lot more, including using Presenter View, importing video and audio, and formatting for widescreen displays.