It was enough to analyze the behavior expected of potential customers -What language they speak, what search engines use, what words refer to our services or products, to design a good plan to allow us to reach out to these customers. A website with good usability and a careful design facilitated the transit of visitors to our website and increased the likelihood of conversion, whether it make a contact, a purchase or a partnership. Reward past customers or communicating directly to their email new offers allowed encourage cross purchase and repeated previous clients, cultivating their loyalty. And these good customers acting, its own motion, like the best relating to attract new users. All this in a more or less controlled and predictable. Then came the Web 2.0 Although general search engines are still the main window on the Internet, we can not ignore the growing importance of social networks in generating quality traffic. This is what has been called the Web 2.0 with new patterns of relationships in which consumers acquire a new role, either because they share information, forums, chats, or because they become opinion leaders or experts-blogs-either because they add their votes to reward or punish their favorite content, social bookmarking or insulted, or because produce or share your information, wikis, etc. In any case, Web 2.0 means opening for anonymous Internet users a new opportunity in which to express their opinion, where you can participate in a collaborative environment and where a significant influence on the generation fashion, trends, product reputation, brand recognition, etc..