I enjoyed it!!! Thanks to you, I learned a lot This is the second lecture by Baekgi Seon after the Spring Framework introduction lecture! Thank you for the great lecture. I think I watched it for about a week while commuting to work on the subway and at a cafe in the evening. When I studied Spring Boot before, I implemented parts (especially Magic Security) without properly understanding the principles by reading tutorials and blogs. Now, I finally understand the principles. In particular, it was very helpful to see how libraries are managed repeatedly when adding dependencies. In addition, the parts where you said you went astray once or twice were really helpful because even if you don't understand everything right away, you can know what to look for when you need it! I highly recommend this to those who have used Spring Boot at least once but are wondering "So what is Spring Boot?" rather than those who are new to Spring!!