Facebook CEO Mark Zuckerberg announced Graph Search at a press event at Menlo Park headquarters, billing it as a new way find people, photos, places and interests that are most relevant to Facebook users.

Graph Search will help you instantly find others, learn more about them and make connections, explore photos, quickly find places like local attractions and restaurants, and learn about common interests like music, movies, books and more. All results are unique based on the strength of relationships and connections.

How graph search is different  than web search

Graph Search and web search are very different. Web search is designed to take a set of keywords (for example: “hip hop”) and provide the best possible results that match those keywords. With Graph Search you combine phrases (for example: “my friends in New York who like Jay-Z”) to get that set of people, places, photos or other content that’s been shared on Facebook. We believe they have very different uses.

To know more about graph search : http://www.facebook.com/graphsearch