I managed to complete the course during lunch breaks and finished it over the weekend~! Since I'm currently working on websites and applications.. HTTP is familiar to me, but I don't remember properly learning it, so while I knew how to use it, I wasn't confident explaining it verbally. Through this course, I learned that REST in RESTful API stands for representation, and I gained knowledge about cookies, sessions, proxies, how to read request/response headers, etc., which was beneficial and great😭😭 When I actually listened to it, it wasn't as difficult as I thought, but in reality I was in a state of not knowing.. and no one explained it clearly to me(?) so I was vaguely unaware.. Thank you for explaining it so clearly.. Thanks to Younghan, I'm motivated to study harder! Thank you for creating such a great course that allows me to learn well, study, and work!