Documentation is important. In fact, I didn't realize how important documentation was until this lesson. I've always felt that a lot of documentation work can seriously slow down the progress of game design. But now I realize that this is actually necessary. Without a good documentation project, game development will encounter many obstacles. Designers will get lost and even do things that deviate from the design direction. Resulting in wasted time. These are the things that need to be avoided in the game development process.