Picture it. Your customer places an online order. You email them a receipt. Even if the receipt doesn’t include your customer’s credit card information, it still likely contains a lot of personally identifiable information (PIN) such as your customer’s name, address, telephone number, and email address. If your email were hacked, all the information would be leaked.
Two-factor authentication, or 2FA, is an additional layer of security that decreases the likelihood of an account being hacked. The idea behind it is that logging into a service requires something you know and something you have.