QR codes in retail: shelf edges, windows and packaging

Retail QR codes tend to be added because they seem modern, then quietly ignored. The placements that actually generate scans have something in common: they answer a question the customer already had.

The window is the best placement

A window code works during the sixteen hours a day you are closed. Someone walks past at nine in the evening, sees something they like, and scans. That traffic is otherwise lost entirely.

Print it at least 20 cm across — window scanning happens from a couple of metres, often across glass with reflections. Point it at your store, your opening hours, or a booking page depending on what you sell.

Shelf edges answer questions staff repeat

If your staff answer the same question twenty times a day, that question belongs behind a QR code. Sizing charts, ingredient lists, care instructions, comparison tables, how-to videos.

This is not about replacing staff. It is about the customer who does not want to ask, and would otherwise leave without buying.

Packaging keeps working after the sale

• Assembly or usage instructions, which you can improve over time without changing the box.
• Reorder links for consumables — the moment someone runs out is the moment they are most likely to buy.
• Warranty registration, which gets you a contact you did not have.
• Recycling guidance, increasingly a regulatory requirement rather than a nicety.

Measuring what works

Use a separate code per placement — window, shelf, receipt, bag. They cost nothing to create and the scan counts tell you which placements deserve the space. Most retailers discover one placement massively outperforms the rest, and it is rarely the one they expected.

Give people a reason

A bare code with no explanation gets ignored. "Scan for sizing" or "Scan for 10% off" gets scanned. The frame around the code matters as much as the code, and it costs nothing to add a line of text.