A QR code turns any printed thing (a visiting card, a shop board, a bill or a sticker on the counter) into a doorway to your full, up-to-date details. Here is how they work, where to put them, and how to print one that actually scans.
How a QR code works, in one paragraph
A QR code is a square pattern that stores a short piece of text, usually a web link. A phone camera reads the pattern and offers to open the link. Nothing is stored on the customer's phone and no app is needed: almost every Android phone and iPhone camera can read QR codes directly, and Google Lens does it too.
Why a QR beats printing everything on paper
- The link stays the same, the page changes. Print the code once. When your number, prices or timings change, you edit the card page and every printed code shows the new details.
- It carries far more than paper can. One scan opens products, prices, photos, map, WhatsApp and UPI.
- It saves your number for them. The card page has a Save contact button, so the customer doesn't have to type anything.
Where to place your QR code
| Place | Why it works |
|---|---|
| Billing counter | Customers are standing still with their phone out to pay |
| Back of your paper visiting card | Paper card plus the always-current page behind it |
| Shop shutter or entry board | People can save your details even when you are closed |
| Delivery bags and parcels | The next order is one scan away |
| Printed bills and receipts | Customers keep them and come back to reorder |
Printing a QR that scans every time
- Size: on a visiting card, keep the code at least about 2 cm wide. On a counter stand or shutter, go much bigger, because people scan from further away.
- Contrast: dark code on a light background. Avoid light-on-dark and avoid placing the code over a photo.
- Quiet border: leave a clear margin around the code. Text or patterns touching the edges stop phones from reading it.
- Surface: matte lamination reads better than glossy under shop lights.
- Test before you print in bulk: scan the proof with two or three different phones, including an older one.
Static or dynamic: does it matter?
A "static" QR stores the final link directly. A "dynamic" one stores a short link that forwards somewhere else and can be changed later. For a digital card, the card link itself already acts like a dynamic code: the link stays fixed while you edit what the page shows. That means you don't need a paid dynamic QR service on top.
Common mistakes
- Printing a QR that points to a link you might stop paying for or that expires
- Making the code tiny to fit a design, so it fails in dim light
- Not saying what the code does. Add a line like "Scan for menu and WhatsApp order"
Your MyDigitCard dashboard has a print kit with ready QR designs for counters and cards. If you are still deciding whether you need a digital card at all, read digital vs paper visiting cards, or make your card and get your QR.