Hello PyoungMoon Thank you for taking the course. This course was created for many people who are interested in reinforcement learning but gave up because it was too difficult. Reinforcement learning is the most difficult field in the field of artificial intelligence. You need to know basic mathematics and artificial neural networks, and MDP, which is the basis of reinforcement learning, also has a lot of unfamiliar content. This course explains the basic theory, so even people without background knowledge in mathematics and artificial intelligence can understand it sufficiently. If you listen carefully from the beginning and listen to the parts you don't understand a few times, you can fully make reinforcement learning your own. If there is anything you don't understand, please leave a comment in Q&A at any time. Thank you.