Yubico recently started a series of instructional set-up videos, helping you with the set-up of your YubiKey.
If you’re a novice to online hardware security then setting up your YubiKey can seem daunting, whereas it’s actually quite easy. Two-factor authentication (also known as 2FA or two-step verification) is a method to confirm a user’s claimed online identity by using a combination of two different types of factors. A password is typically considered one factor, and with 2FA that is combined with another factor to increase login security. Read more here.
Your YubiKey will work instantly with hundreds of services; for a complete and up to date list please go here. To assist with the setup you can watch their new Yubico instructional series on Yubico’s YouTube channel.