A QR code is a two-dimensional code that stores information in the form of a matrix of black and white dots. The code can be used in various ways, for example to establish a connection to a website or to store data or contact details. To read the information in a QR code, a reader or app is required that can scan the code and display the information it contains. QR codes are usually quick and easy to scan, making them a convenient way to store and share information.

In the world of marketing, QR codes have become increasingly important in recent years as they offer an easy way to direct customers to online offers or additional information. QR codes can be placed on a variety of media, from posters and brochures to products. QR codes are also widely used in logistics and retail. In logistics, QR codes can be used to track shipments or store important information about products and deliveries. In retail, QR codes can be used to link customers to additional product information, reviews or an online shop.