User feedback is essential in app development as it informs enhancements, determines user needs, and guides design improvements. Collecting input through methods like surveys, usability testing, and reviews helps developers understand how users interact with the application and what challenges they face. This direct feedback loop fosters an iterative development process, where adjustments can be made rapidly to improve user experience. Additionally, addressing user concerns enhances customer satisfaction and builds trust, ultimately leading to higher retention rates. Incorporating user feedback helps ensure that applications remain relevant and aligned with market demands.