Collaborative consumption involves systems like product service systems, redistribution markets, and collaborative lifestyles. It is driven by factors such as trust between strangers, idling capacity, critical mass, peer-to-peer technologies, environmental concerns, and cost consciousness. Key mechanisms for building trust include personal profiles, official verification, degrees of separation, peer reviews/ratings, and in-person screening. The document discusses the growth of collaborative consumption and sharing economies enabled by social technologies and changing consumer attitudes.