What exactly is 2 factor authentication?

What exactly is 2 factor authentication?

Two factor is an extra layer of security on your account. Because somebody will need a code sent to something that belongs to you, without this code they cannot log into your account on an a device Apple does not recognize. This means if somebody learns what your password is, they still can't get into your account.

What do I need for 2 factor authentication?

You also ask what you need for two factor.

You need something that can receive a code. This is either a trusted device Apple knows is secure and is yours, or a telephone number (even a landline).

Get a verification code and sign in with two-factor authentication - Apple Support

You also need to be somewhere that supports it: Availability of two-factor authentication for Apple ID - Apple Support

More in general about two factor: Two-factor authentication for Apple ID - Apple Support

Two-Factor authentication is a mechanism to secure your Apple ID.

It makes it so a code is required when logging in to your Apple ID on a new device or Apple website.

The code will be sent to your trusted device, in this case your iPad.

You can read more about it in the following support document.

click here ➜ Two-factor authentication for Apple ID - Apple Support