Two-factor authentication (2FA) enhances account security by requiring two forms of identification, typically a password and a code sent to your phone, to access an account. This added layer of security makes it more difficult for hackers to gain unauthorized access, as they would need both your password and your phone. Johan Edholm from Detectify highlights the importance of using 2FA, especially for email accounts, since they are often the key to accessing other services. He suggests that receiving unexpected login codes can serve as a warning sign that someone may have your password, prompting a password change. Despite being occasionally inconvenient, enabling 2FA on all available services is strongly recommended to prevent unauthorized access to accounts. Activating 2FA is generally straightforward and can typically be found within the security settings of most services, such as Facebook's "Login Approvals".