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

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.

On mobile, what are the core apps? It's basically messaging, mapping and review data.

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

Maintaining the trust of the consumer is critical to our business

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

I think with every successful consumer Internet business, there will be lawyers that are interested in going after your company, especially when they think that there's a financial incentive.