After reading the article I found diagram cute, that's true. But I still don't understand the method how they are generated. It's not even discussed in the arti

After reading the article I found diagram cute, that's true. But I still don't understand the method how they are generated. It's not even discussed in the article. I don't know the benefits of it, how do you analyse a diagram? It sums up to a big text advertising a cute poster.