This document provides an overview of virtual reality (VR) including its applications, benefits, and how it works. VR immerses users in simulated environments through head-mounted displays to make experiences more engaging. It has proven useful across industries for training, sales, and marketing by bringing content to life. Examples are provided of companies using VR for safety training at KFC and UPS, virtual product testing for Volvo, and real estate tours for Lodha Group. The document concludes by mentioning augmented reality (AR) and mixed reality (MR) as extensions beyond VR.