what does the magnetic on Google cardbaord do?

[adambucky]

What does the magnet on the side of a google cardboard due? (I have the one made by Minkanak)
it can be moved downwards in the gap provided in the cardboard but moves straight back up again
does it need to stay in position when moved in order to work?

Thanks

 

[anon(9691750)]

It allows you to interact with your device while in VR.