Google and Bing Grow Share of U.S. Search Spend and Clicks

Google continued to grow its dominance of the paid search space during the first quarter of 2010, according to a report from agency Efficient Frontier.

The agency’s State of Search Report estimates the search giant accounted for almost three quarters of all spending on search advertising in the U.S. during the first three months of 2010, up from a 74.2 percent share in Q1 2009 and 72.3 percent share in Q4.

Microsoft’s Bing engine also experienced substantial relative growth, accounting for 6.5 percent of spend during the first quarter of this year, up from just 4.5 percent in Q1 2009.

Growth for those two parties comes at the expense of Yahoo’s ailing search product, which saw its share of spend drop to 18.7 percent from 21.3 percent. Similar trends were evident for share of clicks.

Of course, Microsoft and Yahoo penned an agreement in July that effectively made Bing the default provider of paid search services on Yahoo sites for the next 10 years, with the pair splitting the revenue generated from traffic through Yahoo properties.

Images below provided by Efficient Frontier.