Cemu is a Wii U emulator for Windows (and potentially other operating systems in the future, though that[SQ]s not officially supported yet). This means it[SQ]s a program that allows you to run Wii U games on your Windows computer. Instead of needing a Wii U console, you can play those games on your PC, provided you have the necessary hardware and a copy of the game[SQ]s files (which you would legally obtain only if you already own the game).

Keep in mind that emulating games is a complex process, and Cemu requires a relatively powerful PC to run many games smoothly. Performance varies depending on the game and the specs of your computer. Also, the emulator is constantly being improved, and some games might run better than others at any given time.