A more thorough explanation:

A moderator is someone who leads or presides over a meeting or assembly. In some cases, they may be elected to this position.

• The moderator of the debate kept the discussion on track and ensured that everyone had a chance to speak.
• The elected moderator of the General Assembly of the Church of Scotland presides over the annual meeting of the church.

These examples illustrate how a moderator is responsible for leading and guiding a group discussion or assembly. They may have the authority to make decisions or enforce rules, and their role is to ensure that everyone has a fair chance to participate and that the meeting stays on topic.