This document discusses using augmented reality (AR) in smartphone apps for marketing. It defines AR as adding multimedia content like text, images, video and 3D models to the live camera view. There are three main types of AR apps: marker-based AR adds virtual content to prints and products; GPS-based AR adds content to locations; and panoramic 360 AR immerses users in surroundings. The advantages of AR apps include engaging customers who always have their smartphone, creating interactive 3D content with a direct link to products or stores for a long-lasting effect. The document provides tips for using AR effectively in communication and apps to add value for customers.