Social is the fastest-growing digital advertising channel globally in the next five years. Marketers must understand what's driving this spend and adjust their spending strategies to match. This forecast discusses how Asia Pacific, the US, Europe, and the rest of world are faring; it also outlines the global similarities and regional differences. For the first time, we're including video's share of total social advertising spend for 13 key markets: the US, France, Germany, Italy, Netherlands, Spain, Sweden, the UK, Australia, China, India, Japan, and South Korea.