The document discusses three important concepts for gamification strategy: the "Empty Bar Problem" which refers to getting users to come to a store or platform even when there are no other users; "On Boarding" which means making it easy and fun for new users to start using the system; and the "Engagement Loop" which aims to keep users coming back through easy and enjoyable interactions. These three concepts - "Empty Bar Problem", "On Boarding", and "Engagement Loop" - are presented as the most important things for a successful gamification approach.
