Arenas are instanced areas in which teams of players can compete against each other in deathmatch-style PvP.
Unlike battlegrounds, the arenas are not based on objectives, but simply your team's ability to obliterate the other team.
Two teams of the same faction are allowed to battle each other in the arena...
Arena matches are available in rated mode or skirmish (unrated) mode and can either be 2 versus 2 or 3 versus 3.
In rated mode, winning and losing matches will adjust the personal rating and matchmaking rating (MMR) of players accordingly.
Match selections are determined based on the average MMR of the team. This works similarly to rated battlegrounds.
Players can queue for arenas through the PvP interface.
Skirmish mode allows players to queue by themselves or with their friends and the game will fill the remaining spots.
For rated mode, players in a party of the appropriate size (cross-realm groups are supported) may queue for an arena bracket of the same size.