Worked on app world for me. There are QR Barcode scanner apps you can download to scan that barcode as well.
When you scan it, it takes you to a mobile site called "Qreo" and it asks you, What is your favorite thing about Oreo Cookies? And you just type it in the box in 50 characters or less.
You can read other responses as well, and there are some pretty funny ones lol.