The document discusses how marketers are leveraging second screens like smartphones and tablets to engage with viewers watching television. It outlines 10 ways marketers are using the second screen, such as incentivizing ad engagement, gamifying TV ads, enabling real-time interactivity, and creating opportunities for transmedia storytelling across devices. It also provides background on new behaviors like social TV and tools like apps that sync with television content. Experts believe the second screen could improve brand recall and purchase intent when used to extend television campaigns.