These guidelines are part of the broader Global Ad Impression Guidelines that were launched in 2004 and follow the recent release of the Broadband Measurement Guidelines.

With these guidelines, marketers will have a standard basis for consistent and reliable measurement of performance based marketing. Moreover, once independent auditing against these guidelines is initiated, advertisers will have greater assurance and belief in their internet marketing spend.

"Click Measurement is the next phase of the Interactive industry's groundbreaking Global Measurement Guidelines initiative," says Greg Stuart, CEO of the IAB. "These guidelines demonstrate our continued commitment to being the most accountable advertising medium and providing marketers with the highest possible level of transparency."