The concept of Server-driven UI (SDUI), a technique that allows for more rapid iteration and deployment of mobile applications by shifting client-side logic to a remote server. The author, Hamish Cundy, details Empower's implementation of SDUI, using Kotlin and GraphQL to decouple the client app from the backend, enabling quicker updates and product experimentation. He provides a detailed overview of the architecture, including components, actions, and screen definitions, illustrating how SDUI empowers mobile developers to deliver new features and bug fixes with significantly reduced timeframes. The article concludes with a discussion of the benefits and future possibilities of SDUI, showcasing its potential for increased agility and user-centric development in the mobile landscape.