QR Code
Definition
A square barcode that stores information and can be scanned with a smartphone camera, widely used for quick access to websites and promotions.
Use Cases
- McDonald's: Mobile ordering and promotions by letting customers scan QR codes to open app or web experiences. — QR codes are printed on packaging, in-store signage, or receipts and encoded with URLs that deep-link into mobile experiences or campaign landing pages; the destination content is hosted on web/app infrastructure and tracked with analytics. (Faster access to digital ordering and promotions, improved campaign measurability, and reduced friction compared to typing URLs.)
- Starbucks: In-app payments and loyalty by scanning QR codes at checkout. — The Starbucks app displays a QR code tied to the customer’s account; point-of-sale scanners read it to identify the account and process payment/loyalty actions through backend systems. (Quicker checkout, higher loyalty engagement, and more consistent customer identification across stores.)
- Singapore Government (TraceTogether): Venue check-ins using QR codes for public health contact tracing. — Venues displayed QR codes that encoded a check-in URL/identifier; users scanned to register presence, with records handled by government systems for tracing workflows. (Streamlined check-ins at scale and improved ability to notify exposed individuals during outbreaks.)
Frequently Asked Questions
- What's the difference between a QR Code and a barcode?
- A traditional barcode is usually 1D (lines) and holds a small amount of data, often just an ID number. A QR code is 2D (a square grid) and can store more information, such as a URL, text, or contact details, and it scans reliably from many angles.
- When should I use a QR Code?
- Use a QR code when you want people to move quickly from something physical (poster, product label, table tent, ticket) to something digital (menu, payment page, app download, Wi‑Fi details, form). It’s especially useful when typing a URL would be slow or error-prone.
- How much does a QR Code cost?
- The QR code image itself is typically free to generate with many tools and libraries. Costs usually come from what the QR code points to (website hosting, database, analytics, URL shortener, or a paid QR management platform). Printing the code on materials also adds cost.
Category: data
Difficulty: basic
See Also