Although it is a simple cardboard box in which you insert your phone, brought to your face, it turns into a virtual reality headset.
You can view virtual content (Digital Infographics) or real content (360° pictures and videos).
EVERYONE can experience virtual reality now.
Plastic Virtual Reality headsets such as HTC Vive and Oculus have an integrated high resolution display. With Google Cardboard, this display is replaced by your smartphone screen, which makes it very easy to use.