Augmented reality is something that falls into a similar area to virtual reality in that they both currently require some sort of headset or screen to provide the modifications to the world, but with one major difference. Augmented reality takes place in the real world rather than being something that is in a digitally rendered world.
AR headsets are similar to VR but they normally have some kind of clear visor or glasses, allowing the user to see the real world through them. Some pieces of tech in the headset will then project additional data onto the visor to augment what the user sees.
Games like Pokemon Go have also made use of AR via smartphones by using the phone camera to capture the reality and then using the phone screen to render something unique into this picture. This is currently the most easily accessible method of augmented reality that is available on the market.