Easy/ medium /Difficult
To print screen is to liturally take a picture of your screen/desktop
For all you imaginative people, no a camera doesn`t pop out your computer/laptop screen and take a picture and then jump back in (though it would be cool!)
It`s actually much much simpler.
The only thing you need to bare in mind is not all computers are the same.
If you are using a computer, find the button saying “prt scrn”
If you are using a laptop, it will most likely be prt scrn + Fn
After clicking either of the above all you need to do is paste it (into Paint, photoshop, PSP etc.)
Hope this helped!