This document discusses mobile backend as a service (MBaaS). It begins by covering the evolution of mobile app development from local infrastructure to cloud-based services. It then outlines the key services typically provided by MBaaS like user management, storage, notifications, and social integration. The benefits of MBaaS for developers in simplifying development and providing APIs for common services are also highlighted. Finally, the growing MBaaS market landscape and major players like Salesforce, Facebook, Google, and Kinvey are briefly summarized.