Both Redux and MobX are well organized in the documentation, but for those who are impatient and want to get a taste of it quickly, this is the perfect fit. In addition to the example code, it also explains the operating principles to some extent, so it is recommended for those who find it difficult to read the documentation. However, both Redux and MobX have so many better design methods depending on the service that it seems difficult to use the content in the lecture to fit the service. As the instructor said, I think it would be good to look at the documentation as well. Thank you for the great lecture :) * For your information, I left a comment because I had a question during the lecture, and they answered me the next day. Since it is a paid lecture, I think this part is important when deciding to purchase the lecture, so I am leaving it.