Everyone is panicked about the transition to mobile. I don't lose any sleep whatsoever.

A lot of what Groupon is generating is demand for something people didn't know they wanted.

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.

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

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

Maintaining the trust of the consumer is critical to our business

There is this cat and mouse game that plays out over time where our team comes up with new and interesting ideas to identify content that we shouldn't recommend, and over time people are constantly probing that, trying to figure out how can they get around that and get a better reputation on Yelp.