This document discusses QR codes, which are scannable codes that can link to various digital content when scanned by a smartphone. The summary is:
QR codes can be scanned by smartphone cameras and provide quick access to websites, contact information, maps, videos, and other online content. The type of QR code used should match the desired user interaction - website QR codes for information, contact QR codes to share contact details, and calendar QR codes to add events. QR codes can be customized and embedded in many situations to creatively engage users.