Much like the name suggests, a desktop PC is a PC that is typically found on your desktop. A desktop PC consists of a cabinet or tower, which houses the PC’s hardware. Because the PC itself ‘only’ consists of the hardware, things like a mouse, monitor, and keyboard need to be purchased separately.
The advantage of a stationary computer is largely that you get a lot of power for your money, as well as the ability to customize the hardware and easily upgrade it.
Desktop PC’s are excellent for people who game or do heavy, graphical and video work.