TripAdvisor, the world's largest travel site, today announced it was also the world's largest social travel site.

It has been teaming up with Facebook to help more than 100 million travellers plan their trip by featuring suggestions from their Facebook friends.

"We are excited that 100 million travellers have had a personalised experience on TripAdvisor, making TripAdvisor the world's best site to plan a trip using the wisdom of your friends.

"Providing travellers with a social trip planning experience will continue to be a strategic focus at TripAdvisor. "We look forward to having even more travellers see their friends' travel recommendations on TripAdvisor," said TripAdvisor Global Product vice-president Adam Medros in a statement.

TripAdvisor launched its Trip Friends product in June 2010, highlighting where friends had been as shown on the ''Cities I've Visited Facebook'' app.

In December 2010, TripAdvisor enhanced Trip Friends with instant personalisation as part of its ongoing integration with Facebook. People can also view hotels that their Facebook friends have rated on TripAdvisor and they are listed first in the company’s hotel rankings section. This was made possible through the travel site’s continued integration with Facebook.