The acronym 2FA stands for two-factor authentication, a security protocol that adds an extra layer of protection beyond just a username and password. It typically involves two forms of verification: something the user knows (like a password) and something the user possesses (such as a mobile device or authentication app). 2FA helps safeguard sensitive information by significantly decreasing the likelihood of unauthorized access, as even if one factor is compromised, the second layer still protects the account. This approach enhances overall security and is increasingly adopted by organizations.