User testing is crucial in app development as it helps identify usability issues and gathers feedback from real users. This process allows developers to understand how users interact with an application, uncover pain points, and ensure that the user experience is intuitive. By conducting tests at various stages of development, teams can make informed design decisions, which ultimately leads to a more polished product. The insights gained from user testing contribute significantly to meeting user expectations and increasing satisfaction, thereby enhancing the app’s overall success in the market.