This study of field it has as objective generality to analyze the perception of the users of social nets of the Internet how much to its use, for the companies, as strategy of communication with the consumers. The people are, each time more, migrando its social lives for the net, making with that the looks are in this space. Ahead of this scene, the social nets appear as an emergent way of communication with the consumers. The proportionate interatividade for these tools modified the behavior of the consuming contemporary, who left of being a passive element to participate actively of the communication process. In this way, the specific objectives of the present study had been: to present the characteristics of the main sites of social nets of the Internet, to evaluate strategies of communication used by companies through social nets and as these strategies attract the consumer and to identify the perception of the consumers how much to the strategies of communication adopted by the organizations. It stops the reach of the objectives had been used research of qualitative character and quantitative, of descriptive matrix, with techniques of collection of data of comment, interviews in depth and questionnaires, that had been applied to the one show of 150 users of social nets. Analyzing the gotten data, it was identified that the companies are using the social nets to divulge messages advertising executives and to keep a relationship with its consumers. In general way, the participants of the research consider the messages displayed in attractive social nets and elaborated well by the companies. However, one perceived that the messages that more influence the users are those that leave of the friends who they possess in the social nets. From the results, he concluded himself that the social nets of the Internet represent a chance of business for the companies, over all, as for the information generated in the net by means of the messages changed between users of social nets.