Mobile design refers to the process of creating user interfaces and experiences specifically for mobile devices, such as smartphones and tablets. It focuses on optimizing layouts, navigation, and functionality to ensure that users can easily interact with applications and websites on smaller screens. Key principles include simplicity, responsiveness, and accessibility. Effective mobile design often involves using touch-friendly elements, clear typography, and intuitive gestures. Designers must consider various screen sizes and orientations, ensuring that content is visually appealing and easy to read. Tools like Adobe XD and Figma are commonly used to prototype and test mobile designs before implementation.