When making a decision about buying a product or service then you should take into account a range of influences in order to ultimately achieve the desired action. In order to facilitate the realization of the purchase, it is necessary that the consumer is fully aware of all the characteristics of a product or service: in addition to the consumer needs to know that a specific product or service can meet your needs. Consumer behavior affect different factors. There are four basic factors of consumer behavior, such as: the cultural, social, personal and psychological factors. The decision making process in purchasing market of final consumption are knowledge of the problem, information search, evaluation of alternatives, decisions about buying and after buying behavior. Decision-making in the purchase is a very important process, but other than that it is a complex process. In this process, a single page can be found buyers, while on the other hand, marketing experts. The task of marketing experts is the study of behavior, actually attitudes and reactions of consumers. Marketing experts are aware that when buying decisions of customers are different and according to their behavior and role. What will be the level of seeking information about a product or service that is largely dependent on the type of purchase and the size of that purchase significant. It often happens that the customers during trials water habits. Buying decisions actually is a process that involves a series of influences which then ultimately lead to concrete actions, thus buying.