In 2016, social ad revenue globally exceeded the combined ad revenue of Disney, Comcast, Fox, and Time Warner. Marketers and media executives need to understand the dynamics driving social's rise to ensure that their strategies are aligned with the changing landscape. This forecast can help. It includes data on social ad spending across the US, Canada, France, Germany, Italy, the Netherlands, Spain, Sweden, the UK, China, India, Japan, South Korea, and Australia on a per-user basis and by device type. For competitive context, we also provide historical data for key social media companies.