Answering this question helps us teach our children to think critically about what they see and hear. That's important for citizenship in a democratic society. To Make Money. In the U.S. and increasingly around the world, media are big business. Producers sell programs to networks, Networks sell time to advertisers.
Advertisers sell products to viewers.
You are brought to the sponsor by the program. Its primary purpose is to sell the product, it teaches us to buy, period. And to feel dissatisfied unless we have the newest, the latest. The point is not that making money is wrong but that almost everything we see and hear on TV is subject to influence by a profit motive.