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.

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

Maintaining the trust of the consumer is critical to our business

The entrepreneurs that really make it are the ones that start with an idea but are ready to change it at a moment's notice.

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.

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.

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