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.
Off-Chain
All network users can see on-chain transactions because they are recorded on the distributed ledger. Off-chain transactions, however, take place away from the blockchain network
Governance Token
Developers design governance tokens to let token holders influence the direction of a protocol.
Falling Knife
The term falling knife (also known as "Catching a Falling Knife" or "Catching the Bottoms") refers to the action of buying an asset which is rapidly declining in price.