Two-factor authentication keeps your account more secure by requiring both your password and your phone to login and make transactions.
When you log in with two-factor authentication enabled, you will need to enter your password and a unique code generated on your mobile. This provides a second layer of protection on your account. Even if someone steals or guesses your password, they won't be able to access your account without also having your phone.
Please visit the two-factor authentication settings page to set up two-factor authentication for your account.