The main purpose of two-factor authentication (2FA) is to enhance security by requiring two separate forms of verification before granting access to an account or system. This method typically combines something the user knows (like a password) with something the user has (like a mobile device) to create an additional layer of protection. The intent is to reduce the risk of unauthorized access, protecting sensitive information and preventing identity theft. By utilizing 2FA, users can significantly enhance the security of their digital identities.