Yelp is in a very nice spot: local data, and especially review data, is one of the killer apps on mobile phones.

You have to be very nimble and very open minded. Your success is going to be very dependent on how your adapt.

Starting a company, your success is going to be very dependent on how you adapt. You're going to make decisions, you're going to make bets; most of them are going to turn out to be wrong.

Consumers are empowered by Yelp and tools like it: before, when they had a bad experience, they didn't have much recourse. They could fume, but often nothing else other than tell their friends.

Maintaining the trust of the consumer is critical to our business

When Yelp first took off, our rankings on Google would fluctuate wildly.

Choose something you are passionate about - or a pain point that has affected you and that you feel really needs to be changed.