What is a boarding pass?

boarding pass is a document provided by an airline during check-in, giving passenger permission to enter the restricted area of an airport and to board the airplane for a particular flight. 

Vipper boarding pass is an electronic boarding pass. You need the Vipper boarding pass to board the Vipper shuttle. You'll receive your boarding pass after checking in for your flight.

If you check-in online or using your smartphone, you'll receive an electronic boarding pass.