As part of ForecastView’s biannual update cycle, this updated forecast includes market predictions and shifts in US paid search volume and spending patterns caused by consumers’ preferred device usage patterns. Internet users are searching more on mobile devices, and this is causing a trend shift in search volume and revenues, which will increase over the next five years. We forecast that the US paid search market will grow at a five-year compound annual growth rate (CAGR) of 7.8% to reach $50 billion by 2021. This forecast illustrates the size of the US desktop, mobile phone, and tablet paid search market from 2011 to 2021, and it details growth across various industries as well as advertiser revenue sizes.