Sanders repeatedly saw spikes in Google interest after he spoke. After his intro. After he talked about guns. After basically everything else he said. About an hour after the debate began, Jim Webb attracted some attention after he complained about not having an opportunity to speak. But it was Sanders that drew attention the whole time.
What’s more, Sanders actually overpowered the long-term king of Google, Donald Trump. During the debate, Sanders continually attracted more Google interest than Trump.