Once upon a time, adults used to question things: They would ask themselves and others why some things were good and why some things were bad. This was called "discussion" and some people enjoyed it.

However, one day, a very clever person discovered that if you kept repeating how clever you were and how wonderful your products were, then after a while other people got too tired to argue with you and so they just went out and bought these products however "good" or "bad" they really were. This was called "advertising".