This doctoral thesis presents a study on the acclamation of ordinary subjects in the contemporary context. Within the scope of advertising and consumption practices, this acclamation is the starting point for different processes of construction and affirmation of one’s identity, lifestyle, visibility, authenticity performance, as well as recognition and prestige dynamics, all related to Communication aspects. Hence, we herein investigate brand strategies that are geared towards promoting partnerships between brands and influencers, especially those labeled brand ambassadors. Brands establish an affiliation with these subjects that, albeit ordinary, have the significant power to influence others in their group. In doing so, brands create a type of hybrid message that expands in size and exposure (mainly on social media) when it is reflected on self-narratives constructed—we hope—in an authentic manner by the consumer in potential, key element in the process. Thus, the main objective of this study is to understand who are these ordinary subjects who lend their lives, even their own identity, to a brand, how they define themselves and what they represent to others. We support the idea of these individuals as paradoxical nature emblematic characters who can be perceived as ordinary-extraordinary, since what makes them remarkable is precisely being ordinary. Influencers can also be perceived in light of the pair representation-media, because they represent familiarity and anchorage of an accessible identity and a distinctive lifestyle, interesting to those who follow them, and interesting to the brand itself for the possibility of message enunciations and the establishment of a bond with other consumers. In this context, authenticity is an important asset, being assured and managed through dual-quality selfperformance, though extremely imbricated in the subjective scope and in the influencer role. The analysis of the phenomenon from an empirical object (the observed projects, for instance), and in-depth interviews with brand ambassadors allow us to infer that advertising and consumption practices have a special contribution on these ordinary-extraordinary subjects conformation process, assuring them distinction and notoriety. In addition, it is possible to identify the reflexive self-presentation to others on digital network, on conversations, on the streets, and the many possibilities of technology tools, resulting in the (expected) recognition and prestige that legitimize these subjects. Finally, this study aims to contribute with considerations on themes regarding the phenomenon, such as: advertising models suitable for participatory culture, in which ordinary subjects gain great relevance; consumption practices and ways to establish symbolic exchanges in contemporaneity; communication and identity-building processes that underlie self-exposure practices, management of impressions, negotiations and articulations of different purposes.