6.. They contain information from your Disney account.
Once your MagicBand is linked to your Disney account, it will contain information about your FastPass+ selections and include your theme park ticket information. It will act as your ticket into the parks. Simply tap your band to the touchpoint sensor with a Mickey head on it as you enter the park while pressing your finger onto the kiosk as well. You’ll need to use the same finger each day you’re in the parks. This ensures that your band belongs to you and no one else can use your MagicBand, should they find it lying on the ground. (Photo credit: Disney)