The latest statistics released by comscore, the Internet traffic Monitoring agency, show

Google's share of the US web search market fell slightly this August, the second consecutive month of Google's share, according to the latest statistics released by comscore, the Internet traffic monitoring agency. At the same time, rivals Yahoo and Microsoft's market share has risen to varying degrees.

Google's share of the U.S. web search market was 64.8% per cent this August, compared with 65.1% last month, according to ComScore's statistics. It is also the second consecutive month that Google's share has slipped. Meanwhile, Yahoo's market share rose to 16.3%, up from 16.1% last month, and Microsoft's market share reached 14.7%, above 14.4% last month.

Microsoft and Yahoo signed a search advertising cooperation agreement last year to unite to challenge Google's dominant dominance of the market. According to the 10-year cooperation agreement signed by two companies, Microsoft will provide search services to Yahoo's website. Microsoft launched its latest Bing search engine in 2009 and launched a campaign of multimedia campaigns to lure users into using Bing search engines.

At the same time, Google continues to strengthen its capabilities. This June, Google launched a new search feature on the instant page (Instant pages), allowing Chrome users to get results faster. Google's revenues last year amounted to $29.3 billion trillion, most of which came from the search advertising business.

Google shares rose 5.27 U.S. dollars in the Nasdaq market in Monday, closed at 530.12 U.S. dollars, Yahoo's shares fell 22 cents in 14.26 U.S. dollars, Microsoft's shares rose 15 cents, closed at 25.89 U.S. dollars.