Also called a print screen, screen dump, snapshot, or screen capture, a screen shot or screenshot is an image of what's currently displayed on a screen. Screenshots can be created by a program or an operating system. Once a screenshot is captured, it can be saved as an image file, like a GIF (graphics interchange format) or JPEG (Joint Photographic Experts Group). You can also manipulate and print the image after it is saved. The picture is an example screenshot from the game StarCraft.
To learn more, see: How to take a screenshot.