In fact, I had almost no experience with JAVA, and I quickly prepared for a job, so I took this class without any idea what a backend was, and since Spring is widely used in Korea, I had no idea what it was, or what web development was. It was really very helpful. I was able to study on my own to some extent by looking at the reference document, and I can't believe that this is free study. Thank you so much. I think I'll buy many lectures. I'm glad I made the payment here instead of making the first payment somewhere else. Thank you.