Revenue from hotel searches and reservations fell 3% from a year earlier. Speaking on a conference call with analysts Tuesday, TripAdvisor CFO Ernst Teunissen said spurring revenue growth from hotel bookings has been "more challenging" than expected, though CEO Steve Kaufer said the decline was part of an ebb and flow in marketing spending and didn't reflect a longer-term trend. "You've seen our partners' comments on increasing marketing efficiency. They've tightened their efficiencies to do other things," said Kaufer. "We're doing all the things we can on our side to make ourselves a better partner, and I don't detect any reluctance on the part of our partners and hotels to invest in the meta channel." TripAdvisor earlier this year debuted a multimillion-dollar TV advertising campaign, looking to reignite revenue growth and brand awareness by highlighting the ease of booking directly through the site. The company said it would spend as much as $80 million on the campaign. Get the full story at Travel Weekly Read also "TripAdvisor struggles on hotel weakness"