virtual reality :

Virtual reality (VR), the use of computer modeling and simulation that enables a person to interact with an artificial three-dimensional (3-D) visual or other sensory environment.

Early work:

Artists, performers, and entertainers have always been interested in techniques for creating imaginative worlds, setting narratives in fictional spaces, and deceiving the senses. Numerous precedents for the suspension of disbelief in an artificial world in artistic and entertainment media preceded virtual reality.

Education and training:

An important area of application for VR systems  has always been training for real-life activities. The appeal of simulations is that they can provide training equal or nearly equal to practice with real systems, but at reduced cost and with greater safety. 

Entertainment:

As virtual worlds became more detailed and immersive, people began to spend time in these spaces for entertainment, aesthetic inspiration, and socializing. Research that conceived of virtual places as fantasy spaces, focusing on the activity of the subject rather than replication of some real environment.

At the end we can say that Virtual reality (VR) is a simulated experience that employs 3D near-eye displays and pose tracking to give the user an immersive feel of a virtual world. Applications of virtual reality include entertainment (particularly video games), education (such as medical, safety or military training) and business (such as virtual meetings).

References:

1- https://www.iberdrola.com/innovation/virtual-reality#:~:text=What%20is%20Virtual%20Reality%3F,are%20immersed%20in%20their%20surroundings.

2-https://en.wikipedia.org/wiki/Virtual_reality

                                                                                           Abhay Pratap Singh 

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