Cryptocurrency airdrops come in various types, each serving distinct purposes. Standard airdrops distribute free tokens to wallet holders to boost awareness or reward loyalty. Bounty airdrops require users to complete tasks, like social media promotion, to earn tokens. Holder airdrops target existing token holders, often based on snapshot balances, to incentivize retention. Fork airdrops occur during blockchain splits, granting new tokens to users of the original chain. Exclusive airdrops limit participation to specific groups, such as early adopters or community members. Lastly, lottery airdrops randomly select winners from a pool of participants, adding an element of chance. Each type aims to engage users, expand networks, or distribute value, making airdrops a versatile tool in the crypto ecosystem.