Nobody puts in doubt today that the internet is a source of almost infinite information, as well as a means of social and professional interaction. For companies social networks have become a key tool when it comes to recruiting staff (for comparing information, find professional profiles and sometimes to offer vacancies), for those responsible for recruitment social networks provide as much useful information so ratings are more comprehensive for select candidates primarily for posts dealtas responsibilitiespositively evaluating interaction offered and the ease to contact candidates. Its usefulness being fundamental to promote the brand image of the company, as well as to retain customers and find new contacts, and of course to sell, and as a marketing tool, where users become promoters of brands and products, being a shape that has the company learn more and better social networks allow consumers, A personal and social level to be informed, interconnected, communicated, entertaining.It motivates us knowing the things that are happening at a general level, but it is also interesting that it is what makes our friend, we are curious. We can have access to the people that matters, we have located our contacts, both the usual as we who long ago not you contacted, but we like to have, just in case. The same thing we did with the agenda of the mobile or notebook of paper. Also helps us to find who has studied with us in College, University, or we have worked, and we are interested to know or know of him. What will become of your life? Thanks to technology, geographical distances have been reduced and we can approach people, sources of information and resources anywhere in the world. There for whom social networks are a form of expression and communication because they allow them to break down personal barriers, the more shy can venture to say that taking the front person not dare, as for example declared to a Amigo/a, as in past centuries was used the love letter, now use social networks.