Market research company comScore just released their February numbers, and it appears that Microsoft continues to gain market share, and principally at the expense of Yahoo. Bing’s share is now at 11.5% vs. 16.8% for Yahoo. Bing’s share in January was 10.7%. More importantly, though, Bing’s share has increased about 37% since its launch.

Search engine marketers should pay close attention to this trend, if they are not doing so already. If money is still being allocated across the search engines in the same percentages as several months ago or even last month, then campaigns will probably not be optimized. And if this trend continues, then this review process should also be ongoing.

Domus is a marketing communications agency based in Philadelphia. For more information, please visit us at http://www.domusinc.com.