Human-machine interactions were possible with the advent of 4G. As people like to have communication vastly and the development of robots, development of Artificial Intelligence and Deep Learning, latency became smaller. Even though 5G makes man-machine interactions more actively, 6G makes it ultra faster communications which will make the world in our finger tip. People can make Holographic video conferences and can avoid accidents by enabling Visible Light Communication in driverless vehicles. The low latency provides to download a Netflix film with in a blink. Compared to the existing networks, 6G ensures high security, high speed, high reliability and low latency network and ensures a radical transformation by satisfying emerging services and applications in the upcoming years. This paper present a survey of key enabling technologies of 6G and explaining what it might be.