Airdrop hunting refers to the practice of actively seeking and participating in cryptocurrency airdrops. Airdrops are promotional activities where companies distribute free tokens or cryptocurrencies to individuals as a way to gain exposure and generate interest in their projects. Airdrop hunters typically search for upcoming airdrops, sign up for them, and complete the required tasks or meet the specified criteria to receive the airdropped tokens. It can be a way to potentially accumulate new cryptocurrencies at no cost, but it also requires careful research and vigilance to avoid scams and low-quality projects.