Triceps pushups are a very challenging exercise for the back of the arms. Like traditional pushups, they challenge a variety of muscles in the body (not just the triceps)...what makes them different is your hand position on the floor. By using a narrow hand-placement, you can really target the triceps muscles.
However, according to (Kotler & Keller, 2006) the formal definition of marketing is an organizational function and a set of processes for creating, communication, and delivering value to customers and for managing customer relationships in ways that benefit the organization and its shareholders(Kotler & Keller, p.4).
Marketing is the communication of the value of a product or service to customers. Direct Marketing is when you communicate that value... directly. You do this by interrupting potential customers with advertisements, radio jingles, cold calls. You go to them. Indirect Marketing is when you communicate that value... indirectly.