Virtual reality uses headsets to immerse users in simulated, three-dimensional environments. There are several types of VR headsets from high-end systems like the HTC Vive and Oculus Rift to mobile options like Google Cardboard. VR works by displaying stereoscopic images at a high frame rate and field of view with low latency. It is used for gaming, military training, movies, automotive design, medicine, education, and more. The future of VR is promising as the technology continues to advance.