Google Glass Provisioning - where can I find the QR Code?

Question

I just received Google Glass Enterprise Edition 2. Right after I turn it on, the device boots up to a welcome screen with two options.

• Tap to proceed with provisioning.
• Swipe down to skip the Provisioning Wizard and continue with the standard boot process.

I should make a choice because:

For security reasons, after you either complete or skip the Provisioning Wizard, you can't access the Provisioning Wizard again until you re-flash or factory reset the device.

As I understand it's better to select the Provisioning option and ccording to this instruction I should:

Scan the QR code that your MDM or custom agent provided.

I have 3 question:

1. What's the difference between these options, what are the advantages of Provisioning option?
2. Where can I find the QR code for the Provisioning option?
3. What is "MDM or custom agent"