A square barcode that stores information and can be scanned with a smartphone camera. Like a digital business card that contains links, contact info, or other data.
Restaurants use QR codes on tables that you scan with your phone camera to instantly view their menu online.
A QR Code is a data format (2D barcode), not a cloud provider service. Cloud platforms can store the encoded data, host the destination URL/content, and provide analytics, but they don’t have a single equivalent “QR Code service.”