This document discusses the key elements of marketing - the 4 P's of product, price, place, and promotion. It explains each of the 4 P's in terms of what they refer to for a marketing plan. It then discusses how the 4 P's can be translated into the 4 C's of consumer, cost, convenience, and communication when focusing on the customer perspective. Each of the 4 C's is then further explained in terms of focusing on consumer wants and needs, the cost to satisfy consumers, the convenience for consumers to buy, and effective communication with consumers. The document emphasizes that marketing should start with understanding consumers in order to develop successful products and an effective marketing strategy.