Metamask is a cryptocurrency wallet that allows users to securely store, send, and receive digital assets such as Ethereum and other ERC-20 tokens. Airdrops are promotions or giveaways where token issuers distribute free tokens to users of a particular wallet or exchange.

To be eligible for a Metamask airdrop, you typically need to meet certain criteria such as

1. Wallet aged 900+ days

2. Swaps $250,000+

3. 500+ transactions

4. ENS name resolved

5. Gitcoin 3x

6. Infura account + custom RPC

7. Gnosis Safe 2 tx

8. 20 unique months

9. Bridged assets $3k

10. 4+ Networks used