What Wikipedia has to say about Graph Search?
Facebook Graph Search was a semantic search engine that was introduced by Facebook in March 2013. It was designed to give answers to user natural language queries rather than a list of links.[1] The Graph Search feature combined the big dataacquired from its over one billion users and external data into a search engine providing user-specific search results. In a presentation headed by Facebook CEO Mark Zuckerberg, it was announced that the Graph Search algorithm finds information from within a user’s network of friends. Additional results were provided by Microsoft‘s Bing search engine.[2] In July it was made available to all users using the U.S. English version of Facebook.[3] In December 2014, Facebook changed its search features, dropping partnership with Bing,[4] and eliminating most of the search patterns (from wikipedia).
From search bar of facebook you can do the following:
Search for Photos
My Photos
Photos I Like
Photos of my friends
Photosย ofย myย daughter
Photos of Michael Jackson
Search for Businesses
Italianย restaurantsย at Newย York
Italianย restaurantsย atย beerย shevaย myย friendsย haveย beenย to
pagesย likedย byย myย friends
Search Pages
Pagesย likedย byย peopleย whoย likeย Michaelย Jackson
Pagesย likedย byย Markย Zuckerberg
Search People
Peopleย whoย likeย Biking
Peopleย whoย likeย Bikingย andย liveย inย Newย York,ย Newย York
Friends who live in New York
https://developers.facebook.com/docs/graph-api
https://developers.facebook.com/