Ubiquitous, automotive and intelligent character of this digital world which made a vital flow of data. Everything from people and other electronic and automotive devices should be connected to form an intelligent digital world where mobile wireless networks behave as Highways. Compared to the 4th generation 5G communication system has more features. The next generation in the mobile communication system has been considered the most. In the communication system beyond 5G some fundamental issues are needed to be solved like low latency, high data rate and better QoS.6G which can be expected to be deployed by 2027 and 2030 which can be a new paradigm for wireless communication with the support of artificial intelligence and deep learning. Machine learning and deep learning involvement in the communication system have been considered as the main part of 6G. The main driving force behind 6G along with expected key features are has been showed in this article. Evolution of technology from 1G to 6G, its advantages, and comparative study have been discussed.