Two-factor authentication (2FA) provides an additional layer of security beyond just a password. It uses two separate pieces of identifying information to verify a user's identity, such as something they know (a password) and something they have (a one-time security code). 2FA helps protect users and accounts from unauthorized access even if a password is compromised. It is recommended for authenticating users when accessing accounts from unknown devices, creating new accounts, or accessing secure servers or sales leads. The benefits of 2FA include that it is difficult for hackers to break, most people have mobile phones to receive security codes, and it does not require internet access for the user.