- The document discusses mobile/air graffiti, an application created by Kristof Michiels that allows users to create and consume digital content attached to physical locations or objects.
- Air Graffiti uses GPS, Bluetooth, QR codes, or RFID to detect a user's context and location. It then displays relevant digital content like comments, photos, or videos.
- Content can be clustered into channels and customized with rules about visibility, broadcast range, and lifespan. The goal is to provide a highly personalized experience for exploring both indoor and outdoor spaces.