Jeroen Elfferich discusses the rise of second screen usage. He notes that 75% of US TV viewers now use other devices like phones or tablets simultaneously while watching TV. Younger audiences especially are active on social networks to discuss shows. Second screen offers opportunities for navigation, social interaction, information and new ways for viewers to engage. Stakeholders include broadcasters, advertisers and viewers. The five M's framework outlines areas like moment, meaning and mass for second screen integration. Done well it can enhance viewing, but care is needed not to overdo features or let servers crash under demand.