I think of Google as a set of overlapping things. It's a consumer platform, consumer phenomenon of which search is its fundamental activity, but there are many other things you can do than search... I think of Google as an advertising company who services the broader advertising industry in the ways that you know.

We know where you are. We know where you've been. We can more or less know what you're thinking about.

The characteristic of great innovators and great companies is they see a space that others do not. They don't just listen to what people tell them; they actually invent something new, something that you didn't know you needed, but the moment you see it, you say, 'I must have it.'

It's because of this fundamental shift towards user-generated information that people will listen more to other people than to traditional resources.

We run the company by questions, not by answers.

We're about to see an acceleration in technological platforms that, for marketers, will be on a scale rivalled only by the arrival of color TV.

You have to fight for your privacy or you lose it.