Plain meaning
Start with the shortest useful explanation before going deeper.
A distribution of tokens to wallet addresses, typically as a reward for early usage, community participation, or ecosystem contribution. Notable Solana airdrops include JUP (Jupiter, Jan 2024), BONK, and W (Wormhole). Airdrop eligibility often involves on-chain activity criteria (transaction count, protocol interaction, holding duration). Sybil resistance is a key challenge.