A moderator is a person who presides over an assembly, meeting, or discussion. He oversees the whole communication activity as well as he monitors the exchange between participants. He also moves discussions from one topic to another to keep conversation organized. His duty also includes keeping the group discussion on track.
Carry grendel's severed head back to heorot. beowulf finds that hrunting is useless against grendel's mother. beowulf slays grendel's mother with a giant sword.