Is that they’re really useful… if your audience knows what the hell they are.
And even if they do know WHAT a QR Code is, if they can’t remember the word “QR Code,” they won’t be able to find the app that lets them use it.
A lot of your customers have no interest in scanning your QR Codes. Or following you on Twitter. Or checking in. Or downloading your app.
So give those people another way to connect with you.