Strategy that combines the offer of valuable and interesting content, used as bait, with an adequate promotion making creative and legal use of Internet virality to attract traffic and, especially, links that help improve web popularity and with it positioning .
It is the cheapest and most effective form of link building , although it is also the most complicated to implement. It can be developed in a wide variety of ways, such as calling contests, providing downloadable applications, developing tutorials or recommendation lists, offering scoop news or generating controversy.