Marketing people tend to forget that by now a lot of people have seen QR Codes, but...
1) they wouldn't know that they are called "QR Codes" and
2) they wouldn't know how to search an app that scans them.
To make this a bit less difficult for the common people, we suggest to add some information around the QR Code. Like Design QR Codes, this increases scan rates significantly.
On the page Around the QR Code you find some suggestions. You are welcome to download the EPS files for your own campaigns.