In order to confirm the identity of the person entering an account, a verification code is given to a different device. It's used for two-factor authentication.
Airdrop
A marketing tactic known as a cryptocurrency airdrop involves giving away free tokens or coins to existing owners of a specific coin or token.
Coin
Cryptocurrencies known as coins run on separate blockchains and are unrelated to other coins. Such a cryptocurrency's single unit is also known as a coin.
Ad Hoc
a Latin expression that means "for this purpose" or "specifically for this" in contemporary English.