Google fields 35.1 percent of the searches online, followed by Yahoo at 31.8 percent and MSN at 16 percent, according to ComScore QSearch. If the number of searches translates to the percentage of the ad market, MSN generates roughly $1.6 billion annually from search, minus the portion shared with Overture.
But its even a fact that yahoo is the most visited site in the world then comes msn and google.