Most small business owners are not particularly sophisticated business people. That's not a criticism; they're passionate about cutting hair or cooking food, and that's why they got in the business, not because they have an MBA.

Local commerce, without question, will be one of the fundamental use cases enabled by mobile devices over the next several years.

Groupon as a company - it's built into the business model - is about surprise. A new deal that surprises you every day. We've carried that over to our brand, in the writing and the marketing that we do, and in the internal corporate culture.

When you think of couponing, you picture a mom cutting coupons out of the back of the newspaper.

I never thought of myself as an entrepreneur before I started this. I just like to build things.

I think the big thing about Groupon is just people had never seen anything grow quite so fast.

Most of the time, the things that really change the world exist for something fundamentally selfish and then the world-changing ends up being a side-effect of that.