The document discusses the role and tasks of a moderator in facilitating communication and problem solving within a group. A moderator supports effective and efficient communication by helping structure the discussion and ensure participation from all members. Their main tasks involve hosting the meeting, coordinating the agenda and workflow, animating discussion through relevant questions, and acting as a referee to enforce agreed-upon communication rules. The goal of moderation is to help a group achieve their communication purpose, such as solving a problem or planning a project, as efficiently as possible through creating optimal conditions for discussion.