Virtual reality (VR) is a simulated experience that can be similar to or completely different from the real world. Applications of virtual realities include entertainment, education and business in many fields such as military training for soldiers on deployment abroad, professional development at home through medical practice sessions with patients who may live too far away for regular visits etc., interaction between rock stars and their fans via music videos shot inside VR-style video games like Rock Band 4 rather than traditional music videos outside edited environments). It typically involves the use of a virtual reality headset or other device that allows the user to see, hear, and interact with a virtual environment. In a VR experience, users can look around and move about in a virtual space as if they were actually there, and they can even interact with objects in that space. VR is often used for gaming and other forms of entertainment, but it also has many other potential uses, such as training, education, and therapy.