A cryptocurrency airdrop is a token in which we get a token on registering the ico at that time the company are giving free coins to their customer so they enter the market .airdrop can be reedemed by the use of address of a ethereum address's and we can withdraw that token in our ethereum address.

A cryptocurrency Airdrop is a distribution of a cryptocurrency token or coin, usually for free, to a large number of wallet addresses, and primarily implemented as a way of gaining attention and new followers resulting in a larger user-base and a wider disbursement of coins.

Airdrop is more important in life because from airdrop we don't have to invest a single penny and we get a free token and we can withdraw at our time when the ico is over and when the coins is listed on any exchange.