What are these magic bands everyone is talking about?

[angelmom27]

What is an MDE account. I know what it stands for but does everyone have one if you have a ressie onsite? I booked AoA yesterday but not via DW, I did it via Cheaptickets.com
Do I have an MDE account? I downloaded the disney app last year...is this something to do with the disney app?

Anyone can set up an MDE account. When on there you can link your reservation to the account. I used a TA but my confirmation number shows everything on my account. Yes you can also use the disney app to see your plans but also to make changes to your FP selections. Even on the same day you are at the park.