Addressed to the worldwide research community, the article Internet and Emotions: New Trends in an Emerging Field of Research (Serrano Puche, 2016) is a useful guide both for researchers and practitioners. It overcomes the typical dissociation between different research fields and explains the importance of affect, the mediation effect of emotions in any human activity, also while surfing the net or in relation to the use of digital technology. This article reviews studies that have analized emotions such as empathy, annoyance, envy or jealousy, resentment, hope, hatred or grief expressed in the different social media. Not less relevant is the analysis of emotional contagion through social networks and the viral spread phenomenon. Without any doubt, the study of emotions in any research field, as in this case in Media and Communications studies, helps us to better understand the way in which this affection has an influence on the personal identity of humans.