Multi-factor authentication enhances security in cybersecurity by requiring users to provide two or more verification factors to gain access to a system or application. This method often combines something the user knows (like a password), something the user has (like a smartphone or hardware token), and something the user is (like a fingerprint). By significantly increasing the number of potential barriers an attacker must overcome, multi-factor authentication reduces the risk of unauthorized access, thus protecting sensitive data and systems from breaches.