"Yelp, Inc. is an American company that operates an "online urban guide" and business review site. Headquartered in San Francisco, Yelp was founded by Jeremy Stoppelman and Russel Simmons in 2004. The company's Yelp website began as an email service for exchanging local business recommendations and later introduced social networking features, discounts, and mobile applications. Yelp Inc. has extended its services to Canada, Britain, Australia, New Zealand and parts of Europe." (
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