Yves Benchimol, Co-founder and CEO of WeWard, shares insights about his health app that motivates over 20 million users to walk more through gamification. He discusses the integration of cognitive science to enhance user engagement and the importance of prioritizing metrics in a growing app. Yves highlights how WeWard fosters environmental sustainability while promoting mental well-being. Key strategies like streaks and rewards are examined, showcasing how gamification not only engages users but also drives them to healthier lifestyles.