React Native is a powerful open-source framework developed by Facebook for building cross-platform mobile applications using a single codebase, enabling developers to efficiently create apps for both iOS and Android. Its key features include native performance through the use of native components, reusable components, real-time prototyping with hot reloading, and a strong community for support. As mobile app development evolves, React Native continues to redefine the landscape by offering cost-effective solutions and elevating user experiences.