BlueStacks is a popular software that allows users to run Android applications on their Windows or Mac computers. It creates a virtual environment that mimics an Android device, enabling users to download and use apps from the Google Play Store directly on their desktops or laptops. This platform is particularly useful for gamers who want to play mobile games on a larger screen with better controls. BlueStacks supports various features like keyboard mapping and multi-instance capabilities, allowing users to run multiple apps simultaneously for a more versatile experience.