What is multisig?

Multisig, short for multi-signature, is a security feature in Bitcoin that requires multiple private keys to authorize a transaction. A multisig wallet or address is set up in such a way that multiple parties (or keys) must provide their signatures to spend the funds. This feature adds an extra layer of security and is particularly useful in situations where multiple people or organizations need to jointly control access to funds, or when a single user wants to enhance the security of their wallet.