Keras is a user-friendly and powerful API designed for machine learning. It provides a simple and flexible interface for building and training deep learning models. Keras is built on top of the TensorFlow platform and offers a high-level abstraction, making it easy to develop, debug, and deploy machine learning models. It is widely used by engineers, researchers, and data scientists for developing and shipping reliable and performant machine learning solutions. Keras has a vast ecosystem and supports various deployment options, making it suitable for a wide range of applications.