Wow.. I worked as a performance marketer for several years, but I only set things like utm settings mechanically like everyone else, but I found out for the first time that there is a document with a set regular expression, and I only monitored the source media and wasn't interested in the channel, but that part was so new, and it was so good that you explained it in detail in various ways. I haven't found a place that explains in detail how to use GA in practice as much as this lecture, but I'm glad I found it now, so I'm writing a review that I don't usually write. Instructor, please work less and earn more. I feel bad for Infraon because I paid for it with a discount from the Chuseok eventㅜㅜ