Google Inc extended an already wide lead in the U.S. Web search to 63.0 percent share of the market in August, its biggest monthly gain in five months, a report said on Thursday.
Yahoo Inc, the No. 2 player in the U.S. Web search market saw its share of the business drop 0.9 percent to 19.6 from July while Microsoft, the No. 3 U.S. player, slipped 0.6 percent to 8.3 percent, according to comScore Inc.