Bounties are rewards offered to Guardians for completing particular tasks, such as defeating a certain number of enemies of a certain species or class or killing a certain number of enemies without taking any damage. Bounties are posted by Xander 99-40 in the Tower, who also pays the rewards when bounties are completed.
Bounties come in two types: Crucible bounties, which offer Crucible Reputation and experience for accomplishing tasks in the Crucible, and Vanguard bounties, which offer Vanguard Honor and experience for tasks accomplished on Patrols, Strikes, or Raids. A player may take on up to five bounties at once, in any mix of Crucible or Vanguard bounties.
Available bounties are refreshed regularly.