Bing gains market share
“While Google remains the dominant player among small business advertisers, Yahoo! and Bing (formerly MSN) have gained significant market share since the third quarter of 2008, as much as 5 percent. [...]
Additionally, the report shows click-through rates (CTR) improved year over-year across all the engines, with the biggest improvement on Yahoo!, where CTR improved 123 percent from Q3 2008 to Q3 2009.”
Related: Microsoft’s Bing gets ’stickier,’ grabs more local dollars.

