What is bounty in Hivemapper?

Could you please elaborate on the concept of 'bounty' in the context of Hivemapper? I understand that bounties are often associated with rewards or incentives in various online platforms, but how does it specifically work within the Hivemapper ecosystem? Are these bounties tied to specific tasks or achievements, and what are the benefits for users who participate in these bounty programs? I'm particularly interested in how they contribute to the growth and development of the Hivemapper platform.