What are the inspirations from Beer and Diapers?

In a supermarket, people discovered a particularly interesting phenomenon: diapers and beer, two unrelated products, were actually placed together. But this strange move actually led to a huge increase in sales of diapers and beer. This is not a joke, but a real case that happened in the American Wal-Mart supermarket chain that has been talked about by businesses. It turns out that American women usually take care of their children at home, so they often ask their husbands to buy diapers for their children on the way home from get off work. While buying diapers, their husbands will also buy their favorite beer. This discovery has brought a lot of profits to merchants, but how to discover the connection between beer and diaper sales from the vast but disorganized data? What kind of revelation does this give us?