It's a social newspaper, where your friends' feed is a secondary feature.
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The future of Facebook as a social content farm
In the lofty idealism of Facebook, the world's largest social network fosters basic human connections. It keeps you in touch with the people you care about. The number of friends you boast on Facebook is a direct measure of the richness of your social life.
How Facebook manipulated users' News Feeds—and their emotions
With its long history of invading its users’ privacy, Facebook is not exactly known as a paragon of morally upright behavior. But many say the social network went too far with its latest stunt: A new paper reveals that Facebook intentionally manipulated at least 700,000 users’ News Feeds, in an effort to assess how changes to the website affected their emotions.