Two-factor authentication sounds technical, but the idea behind it is very simple. It asks for two different kinds of proof before letting you into an account, instead of relying on a password alone. You may already have used it without realising, for example when a bank or email service asks for a code after you enter your password. This guide explains what two-factor authentication is, why it helps, the main types you will meet, and how to set it up without making everyday sign-ins a hassle. What Is Two-Factor Authentication? Two-factor authentication, often shortened to 2FA, is an extra security step added to a sign-in. The first factor is usually…