What is Metal in Apple's Ecosystem ?

"Metal powers hardware-accelerated graphics on Apple platforms by providing a low-overhead API, rich shading language, tight integration between graphics and compute, and an unparalleled suite of GPU profiling and debugging tools. Your games and pro apps can take full advantage of the incredible performance and efficiency of Apple silicon across iPhone, iPad, Mac, and Apple TV. This year, the new game porting toolkit makes it easier than ever to bring games from other platforms to Mac and the Metal shader converter dramatically simplifies the process of converting your game’s shaders and graphics code."