"Night work is reduced" is a famous saying. Spring Boot is the latest technology in the Spring series. Developing with Spring Boot is hip, but starting Spring with Boot is not recommended. This is because Boot is a compressed result of Spring technology. It is a technology that does not consider beginners at all. I thought I had the basics because I had been developing for a long time, but when I looked at Spring's annotations, I felt like I was covering up and developing code, so I felt uncomfortable. However, this lecture allowed me to use Boot technology by connecting it to old technology, even though it is Spring Boot, so it helped me reduce the discomfort of looking at annotations a little. I said something long, but the conclusion is that if you are a beginner in Spring Boot, I highly recommend this lecture. If you want to learn a technology anyway, you can't learn all the technologies with one lecture. I think you become proficient in the technology by watching several lectures. In that sense, this lecture is a must-have.