Microsoft Adcenter vs. Google Adsense

Microsoft Corp. plans to launch its system for selling advertising alongside regular search results by June in the United States, giving the company its next piece of ammunition in the battle with rivals including Google Inc. and Yahoo Inc.

Microsoft has been testing its ambitious new platform for selling all kinds of online advertising, called adCenter, since last spring. Right now, the company said about 25 percent of the sponsored links that accompany regular search results on its MSN Search site are from adCenter, but that will grow to 100 percent by the time the company’s fiscal year ends in June.