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trimmer80 - 2:34 am on Apr 12, 2006 (gmt 0)
eg. Surfer searches for blue widgets. Thus Google knows that result 2 was a better match than site 1. If this trend continues they may switch results. It is auxilary to the normal algo. In that the normal algo would provide a starting point and then google would "tweak" results based on the user interact. This system will help remove spammy sites and increase serp quality overall.
Traffic patterns lead to a learning system. It would give google better control over what sites are satisfying the needs of the surfers.
Clicks on the first result. Doesnt find the info they are looking for. Goes back to Google and clicks on the second result. Finds the information they were looking for and doesn't continue looking through the rest of the results.