API Composition` is a paradigm that enables the creation of added value by integrating certain services, functionality, and data through their respective APIs to form a new service or product. This approach allows businesses to build personalized service stacks for their companies and add seamless user interfaces on top. Understanding `APIs`, `API Composition`, and the `MACH` (Microservices, API-first, Cloud-native, Headless) paradigm is crucial for executives to make informed decisions, speed up time-to-market, gain stack flexibility, and create business opportunities. However, API Composition also comes with risks and challenges, such as dependency risks, security concerns, and performance issues, which need to be carefully addressed. As the technological landscape continues to evolve, API Composition will play a vital role in shaping the future of digital transformation, IoT, AI, and ML.