In this online ethnographic study and critical interpretation of Instagram, author Elisa Serafinelli (sociology, University of Sheffield, UK) studies 44 Instagram users for three years to explore how Instagram users make use of photographs to create an online persona and what this means for identity formation, social relationships, privacy, and marketing. Drawing on the ideas of thinkers including Marshall McLuhan, Roland Barthes, Henry Jenkins, Anthony Giddens, Michel Foucault, and Jos’e van Dijck, the author explores how the ability to create and post images produces new forms of experiencing everyday life. In addition, she presents an original concept of mobile visualities to examine photography and social communication. B&w photos are included.