This document discusses the opportunities in addressable TV advertising. It outlines two goals: understanding the addressable TV market dynamics in the US and how set-top box data can be used for better online ad targeting and vice versa. It then provides an overview of how the living room and TV watching behaviors have changed, as well as the technology infrastructure that is coming together to enable addressability, including set-top box data and smart TVs/devices. The document envisions the potential of an integrated system that uses TV data for targeted ads across online, mobile and TV platforms, and interactions between the platforms, while also noting several challenges that must be addressed first.