Third parties pay writers for posts praising or panning hotels, restaurants and other places they never visited. How review sites like Yelp and Tripadvisor are trying to stop the flood.
The company, which announced plans to lay off 10,000 workers last week, had warned that is was facing a significant slowdown in the growth of its sales.
The company, which announced plans to lay off 10,000 workers last week, had warned that is was facing a significant slowdown in the growth of its sales.