The document discusses how mobile app marketers can effectively control the full user lifecycle through acquisition, analysis, and remarketing. It outlines key metrics like DAU/MAU, retention, engagement index, lifetime value, and user acquisition ROI that marketers should track to analyze user behavior. Remarketing tactics like campaigns are described to reactivate past users and promote cross-promotion. The overview of Apsalar's analytics and audience tools is provided, highlighting case studies of clients doubling conversions and delivering high percentages of paying users through its solutions.