Before learning web application development in earnest, I needed general http knowledge, and this lecture helped me a lot. Thanks to this lecture, I think I can read network books with less burden. Of course, there are many parts of the content that I didn't understand right away when I only watched this lecture in a situation where I didn't have much practical experience. This is something that I can only understand if I listen to the following lectures and write code myself to incorporate my knowledge. Thank you for providing such a great lecture!