Microsoft, since creating its Bing search engine a year ago, has increased its share of the overall market and paid search, but has mostly gained business from Yahoo! and hasn't made much of a dent in Google's big lead in the category, according to this article. Over the past 12 months, Microsoft has boosted its share of search by about four percentage points, while Yahoo! has lost between 1.31 and 3.7 percentage points, and Google's share has stayed consistent.
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