Until the middle 20th century approximately，the production economy predominates，the company is characterized by certain introversion and the environment is considered immutable. The years pass，the market economy persists because of an application permanent. Gradually supply increases faster than demand，selling prices decline，the competition becomes more and more exacerbated.　　In this context，it was not question of selling products which seemed good to producers，but to design and manufacture those that the buyer wanted. We had to find how convince prospects to purchase our product that of the neighbor. It translated by the appearance and the improvements successive，marketing.　　As Kotler and Dubois define marketing as an economic mechanism and social where by individuals and groups satisfy their needs and desires through creating and exchanging products and other entities value.　　The marketing can be defined as anticipation and adaptation the changes can intervene in market expectations，technique，competitive behavior，not forgetting environmental.