The document discusses how product teams should think about who their customers become when using their product. It prompts asking what type of person the team wants their customers to become and what behaviors or actions they want to inspire. It suggests creating personas, scenarios and customer journeys to model the desired customer. The document uses the example of a transit agency, questioning if they want customers to become fare dodgers since paying fares is inconvenient, and argues they could do better to inspire different customer behavior.