A QR Code (it stands for “Quick Response”) is a mobile phone & tablet readable barcode that’s been big in Japan forever, broke into Europe and China a while back, and in recent years has become popular in the US. Read how Apple’s IOS 11 makes QR codes cool again: https://thenextweb.com/apple/2017/06/07/ios-11-makes-qr-codes-cool/#.tnw_gYT2B2Nh
The reason why they are more useful than a standard barcode is that they can store (and digitally present) much more data, including websites, geo coordinates, text documents, PDF’s and videos.
Modern devices running Windows, Android and Apple software in digital devises now have inbuilt QR reading technology making it even easier to scan digital content. Snapchat, Twitter and Facebook have started using their own variants to make it easy to add friends. QR codes can make accessing and sharing useful data – like contact information, URLs, addresses, phone numbers, etc – incredibly fast and easy. It’s even faster than typing a query into Google, summoning Siri, or asking your friend.
Tesco has now revolutionised the way we shop by scanning QR codes attached to items and adding them to your shopping cart