An MMO (Massively Multiplayer Online) job typically refers to a role within the gaming industry related to the development, management, or support of massively multiplayer online games. These jobs can include game design, programming, community management, customer support, and quality assurance. Employees in this field work to create, maintain, and improve online gaming experiences for large player bases. Depending on the role, tasks may involve coding game mechanics, designing virtual worlds, balancing gameplay, or engaging with players.