I am leaving this review as I am nearing the completion of the course. Before taking this lecture, I was ignorant about GA and my foundational knowledge was almost at zero, but now I have reached a level where I can understand it to some extent. (Of course, there is no end to learning.) I might not be aware of others, but I think the quality is excellent for the price, to the point where I wonder if there is another lecture that teaches everything step-by-step from the basics like this. Also, the instructor reminds us of key points just as they might be forgotten, which was great because it allowed for natural review. If you are wondering, "Can I take this even if I have no foundation?", I would like to strongly recommend it without hesitation. Also, if you join the open KakaoTalk chat room, they often share new GA-related information and host free webinars on weekends, so I recommend joining the chat room as well when you take this course. Thank you in many ways for creating this lecture.