Thinking back, I think I took about 60-70 online courses since I started my first job and have been in the workforce for 15 years. Most of the courses I took with excitement, seeing plausible titles and expected effects, were below my expectations. And I rarely finished the entire course. Thinking back, there was only one reason. 'Not fun.' Since online courses require you to follow along without direct communication with the instructor, it is quite difficult to follow the class if it is not fun. No matter how good the content is, it has to be fun to attract users. The Perfect Presentation course is the first online course that I studied with full concentration from beginning to end. First, it is fun. The charm and friendliness of instructor Kim Jae-seong, who kindly leads the students, is like a kind senior colleague kindly explaining work. I felt that the lectures, which are delivered comfortably as if they are talking to each other, were delivered professionally. Second, the content is perfect. In other words, there was nothing to add or subtract. As I followed the instructor's lead, I was able to understand the A to Z of presentations. As a consultant with 10 years of experience, I have created and presented a lot of materials, but through this lecture, I was able to understand the overall system and reorganize the concepts. If I had taken this lecture 10 years ago, I think I would have grown a little more now. It explains the core of presentations so easily and concisely. Online lectures are informative and fun. Also, since it is divided into appropriate lengths, I can digest each section without getting bored. I am proud to say that this is a must-listen lecture for those who want to understand the overall concept of presentations, create effective presentations, and dream of great presentations.