Steve Kaufer is the founder and chief executive of TripAdvisor — a site that made headlines recently when it warned that some of its hotel reviews might have been manipulated. I asked Kaufer about the site, the credibility of user-generated reviews, and the future of social media.

Elliott is consumer advocate
WHAT'S YOUR PROBLEM? If you're having trouble with a travel business - any business - and you've reached a dead end, maybe I can help. Send me an