In the very beginning, Yelp started as a service where we really didn't think people would write reviews for fun. The whole concept of user-generated content was pretty nascent in 2004.

One of the challenges of buying local advertising is, how do you know if it worked? How do you know if it's got value? We're moving toward an e-commerce experience for local, an Amazon-like experience for local.

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.

When you read reviews on Yelp, you get a good sense of what's going to happen when you walk in the door of that business. The challenge is that there are fifteen million businesses in the U.S., and its very hard to communicate with all of them about how Yelp works, and why it works the way it does.

Most people have been on a baseball diamond and a basketball court. At least once in their life, they've walked across a football field. But relatively few people have ever set foot inside a boxing ring.

I wish I had played team sports. I think every kid should. Teamwork builds character - teaches people about leadership and cooperation.

When you're an athlete and you play every day and are conditioning yourself every year, the aging is gradual.

I recently was in the same room as Leonardo DiCaprio, and one of my favorite movies is 'Basketball Diaries.' That movie hits home for me in so many ways, and in that moment, I was like, 'I have to thank this dude.' So I did.