Boosting in doubles Halo 3 is a technique that allows two players to team up and quickly increase their ranks. To boost, players must find a partner and then take turns killing each other. The player who dies will respawn and then kill the other player. This process is repeated until both players have reached their desired rank.
Boosting can be a controversial practice, as it can be seen as a way to cheat the system. However, many players argue that boosting is a legitimate way to improve their rank and that it is no different than playing the game normally.