Extreme programming (XP) is a software development methodology that emphasizes frequent releases, continuous testing, and collaborative teamwork. It focuses on delivering high-quality software quickly and efficiently by incorporating practices such as pair programming, test-driven development, and continuous integration. XP relies on iterative development, regular feedback, and close collaboration between developers and customers to ensure that requirements are met and changes can be easily accommodated. Overall, extreme programming seeks to adapt to changing requirements and deliver value to customers in a flexible and responsive manner.