I was prompted to receive a One-Time Verification Code, what is this and why is it required?

For security purposes, we may ask you to enter a One-Time Verification Code to confirm your identity. This code is a unique series of numbers and/or letters that you can choose to receive via email or text. If prompted, please select how you wish to receive the One-Time Verification Code and then enter that code into the appropriate field. Please note that you will need a working Internet and/or data connection to receive a One-Time Verification Code. Your One-Time Verification Code will expire if you aren't able to enter it within 10 minutes. You can request another code by selecting your preferred verification option again.