TechCrunch tells us:
Google will soon begin offering AdWords advertisers a new tool to experiment with a variety of different landing page layouts in order determine which one gains the most conversions from site visitors. Google Analytics Senior Manager Brett Crosby unveiled the tool, called Google Website Optimizer, this morning at the eMetrics summit in Washington D.C. If you find web site traffic heat maps like CrazyEgg, ClickDensity or Google Analytics’ own heat map interesting, this looks like the next generation of that kind of tool. If Google’s Website Optimizer can score high on usability, I expect it to be a big hit with small and medium size website publishers.