QR codes (Quick-Response codes) were created in 1994. They are 2D square grids consisting of black and white squares. Essentially, a form of binary. The benefit of the 2D format is to make it scanable with phones. As they are scanable with phones, it is desirable to have a bit of leeway: a camera might be low resolution or the person scanning may be moving or far away. This is the benefit of error correction: certainty.
There are four levels of error correction for QR codes ranging from about 7% of the text being recoverable to about 30%. TYPE MORE HERE.
Thus, a QR code requires more error correction for longer pieces of information. The more information you have, the more room you will need to confirm that information.

PUT CODED FORM OF FEZ QRCODE HERE, BACKGROUND COLOR PUT CODED FORM OF OTHER QRCODE HERE, BACKGROUND COLOR