Use of the keyboard has historically been the primary way to interact with Linux/Unix. Then came along the GUI. I prefer the stock Gnome desktop environment in Fedora as a general way day to day way to interact with my system.
That said, keyboard shortcuts come in handy, so whilst trying to work out which keyboard combination would allow me to select a specific instance of an application that is running i.e. I have two terminals open, which keyboard combo do I use? It turns out that pressing the Super key + ` (the key above the tab) allows me to select between the instances.
More shortcuts can be found here;