Application Programming Interfaces (APIs) facilitate integration by allowing different software applications to communicate and share data. They provide standardized protocols and tools for building software applications, enabling developers to access specific features or data from other applications easily. APIs streamline the development process, allowing developers to focus on application logic rather than underlying complexities. For example, social media APIs enable applications to interact with platforms for posting content or retrieving user data. This capability fosters innovation, as organizations can leverage existing services to enhance their offerings and create new functionalities.