What I initially wrote was too complicated, so I decided to simplify it 1. If you want to read opinions about hotels, restaurants tours, what site do you go first? Tirpadvisor, Yelp etc. 2. If you want to book a hotel room, where do you go first? Booking.com, Hotels.com, Expedia.com etc It's very important to specify which country are you from. I think there are major differences between people's prefferences, based on the continent where they're living (Europeans choose Booking.com when it comes to booking a room; What do people from North America choose when they need to do the same thing?...you got my point). Thanks a lot.