Microsoft abandons Yahoo acquisition

In search usage, Google held a commanding 62.4 percent of queries worldwide, followed by Yahoo in a very distant second place with 12.8 percent, according to comScore. Microsoft ranked fourth with 2.9 percent, after Baidu with 5.2 percent.

In November, Yahoo ranked first in the U.S. in display ad impressions with a 19 percent share, while Microsoft came in third with 6.7 percent, after News Corp.'s Fox Interactive (16.3 percent), according to comScore. Google took seventh place with 1 percent.