The US travel industry’s advertising spending in paid digital media will hit $3.35 billion in 2013 and will rise to $4.96 billion by 2017, for a five-year compound annual growth rate (CAGR) of 11.0%, according to a new eMarketer report, “The US Travel Industry 2013: Digital Ad Spending Forecast and Key Trends.” While growth has slowed from a post-recession high of 30.4% in 2011, travel’s share of digital spending relative to other industries will remain stable during the forecast period. Paid ad spending in the travel industry is currently dominated by OTAs—notably, Expedia and Orbitz—which make the largest US and global ad investments. (Privately held Travelocity spends significantly less.) According to estimates from Mark Mahaney, an RBC Capital Markets analyst, that were published in a March 2013 Bloomberg article, Priceline alone—fueled by its unit—spent $1.27 billion on internet advertising worldwide in 2012, up from $919.2 million in 2011 and $552.1 million in 2010. Paid mobile advertising, in particular, is growing quickly. A study from The Search Agency found that between Q1 2012 and Q1 2013, the majority of US travel and leisure paid search clicks came from PC searches, but the proportion from mobile devices had risen fairly steadily. Get the full story at eMarketer Read also "Expedia’s advertising challenge"