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Content: It will be the first year that advertisers spend more on digital than on traditional media, and the first time that Google and Facebook’s share of digital ad spending declines. That’s due to Amazon, which will continue to chip away at the duopoly. How much will US advertisers spend on digital advertising in 2019? We expect US digital ad spending to reach $129.34 billion in 2019, accounting for 54.2% of total media ad spending. An accelerated decline in traditional media advertising, particularly TV, has led digital to overtake traditional slightly earlier than we previously predicted. What formats are driving US digital ad spending growth? Video will continue to be the major driver of growth, especially on social media. Twitter is one platform that has particularly benefitted from video advertising, with its total ad revenues returning to growth in 2018. Spending on OTT platforms like Hulu and Roku will also boost digital video ad spending this year. What will happen to the duopoly in 2019?