as there are reported computers that have learned to play the difficult Atari Games on their own. AlphaGo, a computer program beat one of the best human Go player in the world. AlphaGo Zero, the most recently published version self-taught and beat all previous AlphaGo versions in a mere 40 days. The technology behind such accomplishments in AI is called Reinforcement Learning (RL), which has existed for decades. Meaningful achievements have been accomplished in the recent years, not only attributed to enhanced computer processing powers and algorithms, but also to breakthrough technology by combining Reinforcement Learning with Deep Learning yields. The topic here - Deep Reinforcement Learning (DRL) will change the capability of machine learning significantly.