What is UI/UX design, and why is it important in software development?

UI/UX design stands for User Interface and User Experience design. UI design focuses on the look and feel of the software, while UX design emphasizes the overall user experience, including usability, accessibility, and user satisfaction. It's crucial in software development because it ensures that the product is user-friendly, visually appealing, and provides a seamless experience, ultimately leading to customer satisfaction and retention.