When I learned the difference between VMware and Docker in the past, I didn't understand it well, and after that, I studied image build, Dockerfile, Docker Compose... and eventually gave up. This time, a new Docker lecture came out, and I watched various visual materials and short preview lectures on YouTube, and the delivery was very good, so I bought the lecture right away and listened to it every weekend. In conclusion, when explaining the theory, the visual materials were really easy for me to understand. I felt that explaining it with pictures rather than just words was especially important for understanding in the Docker lecture. After completing the lecture, I now have the ability to find the necessary commands by looking at the Docker documentation. And based on what I learned, I wrote the necessary parts of Docker Compose and Dockerfile myself and built a CI/CD GitHub Action pipeline for the first time and successfully deployed it. Maybe it's because I'm a college student, but there were still some parts of the Docker practical part that I didn't understand, but I think I've grown to the point where I don't feel averse to various terms such as image build, push, volume, network, etc. I am so lucky to have learned Docker through this course before getting a job. It was a really informative course that I didn't regret spending money on.