Hunting group
From MHWiki
The hunting group is a list of a player's friends.
When a player sounds the Hunter's Horn, members of that player's hunting group currently online (up to one hour from last activity) who are in the same location will be brought along for the hunt if their status is "Ready to Hunt."
Note: If a player fails to claim a King's Reward when it is offered he/she will lose their "Ready To Hunt" status. Trap checks will continue to occur but they will no longer participate in hunts by other members of their hunting group.
Hunters can send a free raffle ticket to up to 20 friends per day.