The value of user experience testing in product development lies in its ability to provide insights into how real users interact with a product. It helps identify usability issues and areas for improvement, ensuring that the product is intuitive and meets user needs effectively. By observing user behavior and gathering feedback during testing phases, developers can make informed design changes before launch. This iterative process ultimately leads to a more successful product that not only retains customers but also increases overall satisfaction and engagement, boosting market competitiveness.