Description: User notification in the context of multi-factor authentication (MFA) refers to alerts sent to users about authentication attempts or security issues. This mechanism is fundamental for enhancing account security, as it allows users to be aware of any suspicious activity related to their access. Notifications can be sent through various channels, such as emails, text messages, or mobile applications, and typically include information about the type of access attempt, geographical location, and time of the attempt. Implementing these notifications not only helps prevent unauthorized access but also promotes greater security awareness among users, who can take immediate action if they detect anything unusual. In a world where cyber threats are becoming increasingly sophisticated, user notification becomes an essential tool for data protection and identity management, contributing to a safer and more reliable user experience.