Suitability for learning is one of the dialogue principles for user friendly design described in the standard ISO 9241-110.
When it is necessary to learn how to use certain functions of a product, this should be as easy as possible. Metaphors and help dialogues guide the user, in order to reduce learning time. For example, the gesture to turn the page on an e-book resembles the gesture to turn the page on a real book. At best, users can guess this gesture because it is intuitive. Besides, the gesture is easy to remember for users because it takes up on their habits.