To screen high - value airdrop targets using on - chain data and wallet address tags, start by analyzing the transaction history of wallet addresses. Look for addresses that have interacted with multiple promising DeFi projects or have held significant amounts of relevant tokens. Wallet address tags can help identify the nature of the wallet, such as whether it belongs to a project team, a large investor, or an active trader. Platforms like Nansen and Dune provide detailed on - chain analytics and tagging features. By combining these tools with your own analysis, you can identify wallets that are more likely to be eligible for valuable airdrops.