If you introduce a really good person to your best friend for a blind date, I want to introduce this course to my best friend without fail. Advantages 1) They answer questions faster than AI 2) The lecture chapters are uploaded to GitHub, so it's really easy to refer to 3) The voice is gentle....(Should I say it's a bit like Sung Si-kyung..ㄷㄷ) 4) The refactoring process is also included