MEmu is an Android emulator that allows users to run Android applications and games on their Windows computers. It provides a virtual environment that mimics the Android operating system, enabling users to enjoy mobile apps with the added benefits of a larger screen and enhanced performance. The emulator supports multiple instances, meaning users can run several apps or games simultaneously. It is compatible with various Android versions and offers features like keyboard mapping, screen recording, and gamepad support, making it a popular choice for gamers and developers looking to test their applications.