What about you is a response to a question that asked for a responds from you, turning the question around to the other person to answer it as well. and what’s about you is a weird term but “what is about you” would most likely be similar to “tell me about yourself. yeah?
Seemed like.
Hope this will help you :)
Answer:
But it has a great importance!
Assuming that you're referring to 'the rules of the game',
The reason why waverly's drawn to the elaborate secrets of chess is because she did not get a good overnight , and represent the relationship between her and her mother