Book excerpt: This book provides a solid, encompassing definition of Internet memes, exploring both the common features of memes around the globe and their particular regional traits. It identifies and explains the roles that these viral texts play in Internet communication: cultural, social and political implications; significance for self-representation and identity formation; promotion of alternative opinion or trending interpretation; and subversive and resistant power in relation to professional media, propaganda, and traditional and digital political campaigning. It also offers unique comparative case studies of Internet memes in Russia and the United States.