This lecture lowers the developer's 'difficulty'. When I was working on a project at school and studying, there were many cases where I didn't know how the technologies were actually used in practice. All I had knowledge of HTTP was 'Let's use POST, GET, PATCH, DELETE separately in relation to CRUD.' But after listening to this lecture, I was able to realize 'How to design URI in practice, how to read HTTP status, how to view developer tools,' etc. Thank you for leaving such a great lecture. It's a small IT company, but I'm going to work for the first time in my life, and if I have a personal goal, I want to conquer the JPA complete conquest series before then and join the company. I feel like Younghan is with me, so this path is not lonely. I was impressed by the way the lecture was organized well while also giving human advice and encouragement. Thank you always!