Short for "multi-signature." It's a type of wallet that requires more than one private key to approve a transaction, making it very secure.
A hot wallet is connected to the internet, like an app on your phone. A cold wallet is an offline device, like a special USB stick, that is more secure.
A special list of 12-24 words that is the master key to your crypto wallet. It's the only way to recover your wallet if you lose it.
Your public key is like your bank account number—you can share it so people can send you crypto. Your private key is like your password—it must be kept secret and never shared.
