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.
Mainnet
A mainnet is a separate blockchain that operates on its own network using its own protocol and technologies.
Impermanent Loss
When there is a price difference between the two assets a trader owns on a DEX, often a cryptocurrency and a stablecoin (such as USDC), impermanent loss might occur.