When you team up with other players in modes such as Duos, Trios, or Squads, all of your active tasks will be pooled together as Party Quests. Not only does this mean you can have significantly more quests available than the usual five you’re capped at, but the progress any of you make will be applied to all of you. By working as a team you can clear a lot more quests and earn additional XP together, making it another great approach for how to level up fast in Fortnite.