This chapter presents the concept of social representations as the intersection between the psychological and the social in the individual, and, through them, the explanations of understanding and communicating, of thinking and creating social reality through symbolic elements are concretized. They are the force that communicates and transforms itself. Social representations are representations of something, someone, and/or a collective. The chapter explores Moscovici’s Theory of Representations, who in the 1960s, by reworking Durkheim’s concept of collective representation, formally articulated collective representations as the starting point of research on social representations, thus creating a theory and a method within social psychology: theory of social representations. It also addresses other conceptualizations around what can be understood by social representation, as is the case of Jodelet, who defines it as a specific knowledge of common sense. Finally, the last two subsections explain, on the one hand, the process of institutions social representations and, on the other, their dimensions.