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.
Node
An essential component of a blockchain infrastructure, a node stores data and allows all communication (transactions) to pass through it.
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.