API stands for Application Programming Interface. It is a set of protocols, tools, and routines that enable software applications to interact with each other. APIs are typically used to enable communication between different software components, allowing them to exchange data and services seamlessly. APIs allow developers to access a service or data provided by another application, without having to understand the underlying code. They provide a standard interface that can be used by multiple applications, making it easier for developers to integrate different services and components into their own applications.