Facebook Introduces Graph Search

Facebook introduced Graph Search in January 2013 as a way to query the social network’s structured data using phrases such as “friends who live in San Francisco” or “photos of my friends before 2010.”

The system differed from web search because Facebook already possessed a large graph of typed relationships: people liked pages, lived in places, attended schools, appeared in photos, and connected to friends. Query processing could therefore traverse structured edges instead of relying only on text relevance.

Privacy rules made the engineering harder. A result could be technically relevant but still invisible if the viewer lacked permission to see the underlying profile or object. Graph Search demonstrated how powerful structured social data could be, while also making users more aware of information they had shared years earlier.