A "Mission Specialist" is a role in space missions, particularly in organizations like NASA. These individuals are responsible for specific tasks related to the mission's objectives, such as conducting experiments, operating equipment, and managing payloads. They work closely with other crew members to ensure the mission's success. Mission Specialists undergo extensive training to prepare for their duties, which may include simulations and learning about spacecraft systems. They often have backgrounds in fields like engineering, science, or medicine, allowing them to contribute specialized knowledge to the mission. Their expertise is crucial for addressing challenges that arise during spaceflight.