"As we answer more of our users' questions, we save them time," he said. "Time is the only quantity that we can't make more of. When people save time, people search more. The Web gets more traffic and all boats rise."
"This used to be the stuff of dreams because we didn't really know how to accomplish it," said Amit Singhal, a Google fellow who has been studying search for 22 years. "The dream has always been to understand things like you and I do, so this this really feels like a sea change."