This is one of those shortcuts that will save you a lot of time (if you're a power user)
You sometimes might want to do these things:
- Uninstall a program
- See all installed devices
- Open a command prompt as admin
- Take a look at the event viewer
- See power options
- and more...
This shortcut opens up a sort of power meny which gives you quick access to a lot of places.
Windows + X
And now you can even use shortcuts within the shortcut to open some stuff directly, my favorites are:
Windows + X, A= open cmd as admin
Windows + X, U,U= shut down the computer
Windows + X, Y= show information about the computer
I hope this could be of any help, have a good day!