Mobile augmented reality (AR) allows digital information to be overlaid onto the real world when viewed through a mobile device camera. The document discusses AR applications in cultural heritage, design, astronomy, commerce and more. It provides examples of AR being used in the arts, such as interactive murals and installations that bring street art to life. The document also brainstorms ideas for using AR in arts marketing, such as allowing audiences to try virtual costumes or showing actors in costume via overlays.