Boosters in Paladins are a way for players to increase the rewards they gain from matches.
Party Boost
Party Boosts are a special type of booster that is enabled when playing with one or more players in a party.
This boost increases the 
Gold, Account XP and Champion XP gain by 10% of all players in the group.
Battle Pass Boost
Battle Pass Boost is a special type of booster that is enabled while having an active Battle Pass.
Battle Pass Boost increases the Gold, Account XP and Champion XP gain by 50%.
Additionally players can also obtain Battle Pass Team Boosters, which when activated will increase the 
Battle Pass XP gain of the user and their teammates by 20%. These boosters are earned as a reward from the Battle Pass.