A WebmasterWorld thread notes of a BusinessWeek report that Ask, Google, Microsoft, and Yahoo are coming together to form standards on what is an "invalid click."

The Internet's leading search engines are teaming up with an advertising trade group to find a better way to identify and measure "click fraud," a scam that has raised doubts about the Web's trustworthiness as a marketing vehicle.

The initiative, announced Wednesday by the Interactive Advertising Bureau, will draw upon the expertise of Google Inc., Yahoo Inc. and Microsoft Corp. -- the owners of the top online search engines -- to attack a problem threatening to erode their profits. Combined, the three companies control 86 percent of the lucrative U.S. search engine market, according to comScore Media Metrix.

Danny at the SEW Blog also covered this with a quick recap of the News.com story.

Definitions are incredibly important and without it, you won't know exactly SEMs and PPC Engines are trying to prevent.

Forum discussion at WebmasterWorld.

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