ELI5: Explain Like I'm 5

Metal (API)

An API (Application Programming Interface) is a set of instructions that help different software components communicate with each other. Metal is a special kind of API that usually works with Apple devices, like iPhones and iPads, so that apps can access certain features of the system, like making a phone call or getting a user's location. Metal can help make apps more powerful and faster, so they can run better and look better on Apple devices.