Augmented reality (AR) enhances the real-world environment by overlaying digital content and information onto the user's view of the real world. There are two main types: marker-based AR which uses images to trigger virtual content, and markerless AR which relies on location to overlay information. AR is used by tourists, soldiers, consumers and more to enhance experiences. As smartphone AR apps grow in popularity, the future includes uses like visualizing home renovations and interactive shopping experiences. While privacy is a concern if AR is connected to social media, the technology does not currently enable gaining private information by pointing phones at people.