The document discusses the principles of gamification. It begins by defining gamification as using game thinking and mechanics to solve problems and engage users. It then discusses the growing gamification market, projected to reach $2.8 billion by 2016. It outlines some common categories of gamification like consumer engagement, employee incentives, and social change. The rest of the document provides steps and considerations for effective gamification, including defining goals, understanding player profiles, setting objectives and challenges, incorporating feedback and rewards, and testing and iterating the system. It emphasizes gamification as a way to drive long-term user engagement and motivation through fun and aspirational mechanics.