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.
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.
Bitcoin Halving
A blockchain event known as a "halvening" (or "Bitcoin halving") causes block subsidies or rewards for validating transactions to be reduced by half.
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.