Google Idea: Eureka!

Here's an idea.

It's all about the "search" for information, right? Well, Google knows what I'm searching for, and they know which links I'm clicking on.

If I go to a webpage and don't find the answer, chances are I'm going to search again.

The website which has the answer I'm looking for will likely be the last one I click on during the last time I search for those terms.

Over time, and with a lot of data, they could correlate search terms with websites based upon which ones caused people to stop searching, and raise their rankings.

They could also see which sites caused people to search again, and lower their rankings.

The feature could be called Eureka! (aka "I have found it!")