Who buy? This is possibly the central aspect of marketing. We have stated that the customer rarely keeps fidelity to a single supplier are so many manufacturers, ticket machines which the consumer will be indecisive on where purchase and is very likely that this decision will change it again and again. The secret of marketing will then directing towards a horizon more clearly. How to do that you between the multiple offerings that make someone stay only with one? And how to achieve that next time repeat his inclinations and so on? Marketing expert manages to bases of creativity, talent and initiative to make the product or service is known in its true dimension and with all the advantages in terms of qualities, prices and utility to obtain the more difficult of all: the loyalty of those who have so many reasons to succumb to the seduction of a growing number of efferent. Who buy? That’s one of the questions that the client does little for one reason is something that Decides to thinking about himself in what suits you and this is something that does not cost you know discover easily by noticing the efforts of those who aspire to do business with the in order to meet your needs. We have made a judicious path of the changes suffered by the marketing in different periods of history especially in the economic development of Nations. We went from the period in which the conditions were imposed by industrial artisans village or emerging providers of city and continue the tour through the historic strip of the post industrial revolution when it became necessary to sell excess inventory to as it would lead and finally arrived in the second half of the 20th century, when we found a customer in position to act if same faithful to their own interests to which is necessary to ask what she wants and needs to then please your desires, needs, expectations and even in his most absurd whims.