Virtual reality (VR) is a computer-generated simulation of a three-dimensional environment that can be interacted with in a seemingly real or physical way by a person using special electronic equipment, such as a headset with a screen or gloves fitted with sensors. The person becomes immersed in this artificial world and is able to manipulate objects or perform a series of actions.

VR technology is often used in video games, but it has also been applied in a variety of other fields, including education, healthcare, military training, and architecture. VR can be used to create immersive experiences that allow users to experience things that would be difficult or impossible in the real world, such as visiting distant locations or traveling through time.

To create a VR experience, the user wears a headset that contains a screen in front of each eye and headphones for audio. The headset tracks the movement of the user's head and adjusts the image on the screen accordingly, creating the illusion of a three-dimensional environment. Some VR systems also include hand controllers that allow the user to interact with the virtual environment.

There are different types of VR systems available, ranging from high-end systems that require a computer to run to standalone devices that are self-contained and do not require a separate device. VR is an emerging technology that is continually evolving, and new applications and uses for it are being developed all the time.