People are building communities of people who use video. They're sharing them. YouTube's traffic continues to grow very quickly.

Around 400 million people in the last year got a smartphone. If you think that’s a big deal, imagine the impact on that person in the developing world.

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.'

In a networked world, trust is the most important currency.

Half of Google's revenue comes from selling text-based ads that are placed near search results and are related to the topic of the search. Another half of its revenues come from licensing its search technology to companies like Yahoo.

Even though Google may do very well, there will always be an alternative to what Google is doing, and people will always have the free choice... because there's no way for us to prevent them from exercising that choice. That is one of the key aspects of why the Internet has been so successful. No technologies can dominate.

I've never met a person who does not want a safer world, better medical care and education for their children, and peace with their neighbours. I just don't meet those people. What I meet, over and over again, as I travel around, is that the essential human condition is optimistic - in every one of these places.