The main objective of this paper is to show the state

of the art of scientific studies on influencers in social media. For this purpose, we have extracted the documents from the Scopus databases (search results for "influencer*" and "social media" were 817) and examined them with the bibliographic analysis tool VOSviewer. The description of the documents claims a fast pace in the last year 2020 (41% of all documents), the strong influence of the United States (29.5% of the documents) and the interesting interdisciplinarity between technical, scientific, and social subjects. The bibliometric analysis provided co-occurrences by keywords, with an increase in human and Instagram aspects, and coauthorships by nationalities with a strong Anglo-Saxon area of influence. In addition to the conclusions derived from the bibliometric analysis, digital citizenship education is claimed to critically address the impact of influencers on social networks.

Social and political activism is one of the pillars of a country's political culture and democratic health. The latest wave of the World Values Survey with a sample of 67,267 respondents in 46 countries, collects two sets of questions on unconventional political actions face-to-face and digitally. A typology of activism and two scales of face-to-face and digital activism (FUPAS and DUPAS) have been obtained. A democratic gap is found between those who participate and those who do not, and another digital gap between those who participate face-to-face and digitally. Its impact has been evaluated by age, more active and more digital young people, and by country, the most active and digital developed countries. Educating for digital citizenship becomes a priority to overcome the divides and improve democratic health.

The latest social movements of the second decade of this century have recently highlighted the image of teenage activists such as the paradigmatic case of Greta Thunberg. These teen activists engage in their activism through social media. Following an analysis of a dozen listings in books and websites of young and teenage activists, 38 teenage cyber-activists have been identified who at least have a Twitter or Instagram accounts. The main results point to a female profile and environmental causes. Another notable finding is the predominance of Instagram, which doubles the number of followers and macroinfluencers of Twitter. These adolescent experiences of digital activism can be a good model and pedagogical tool for education on critical and active digital citizenship.