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.
Altcoin
Altcoin is the term given to describe alternative digital assets, such as a coin or token that is not Bitcoin. This nomenclature comes from the idea that Bitcoin is the original cryptocurrency and that all others are then considered “alternate” or “alternative” coins.
Fiat
Fiat money, often known as fiat currency, is money that a government has recognized as legal tender and that it supports.
Utility Token
Tokens that are designed specifically to be able to help people use something.