Two-factor adds more security to your Reddit account by requiring a second step to sign in. In this case, if you opt into 2FA, you’ll access a 6-digit verification code generated by your phone after a new sign-in attempt. With two-factor enabled, even if someone else obtained your Reddit username and password, they still could not log in as you. You can enable two-factor by selecting the password/email tab under your preferences on desktop. Select enable under two-factor authentication and follow the steps given to you. And make sure to generate your backup codes in the event your phone is unavailable! You can find more help in our Help Center. Two-factor is supported across desktop, mobile, and third-party apps. It requires an authenticator app (Google Authenticator, Authy, or any app supporting the TOTP protocol) to generate your 6-digit verification code.