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How Facebook knows who all your friends are, even better than you do (replace FB with your favourite social network) TLDR; In a nutshell, whenever you sign u
by throwaway888abc 3y ago
How Facebook knows who all your friends are, even better than you do
(replace FB with your favourite social network)
TLDR;
In a nutshell, whenever you sign up for a Facebook account, Facebook asks permission to look at your e-mail contacts if you’re on a computer, or your phone contacts if you’re on a smartphone. When you grant the site permission, it searches your contacts for users already on the network, and it searches other users’ uploaded contacts for you.
https://www.washingtonpost.com/news/the-intersect/wp/2015/04/02/how-facebook-knows-who-all-your-friends-are-even-better-than-you-do/ https://www.washingtonpost.com/news/the-intersect/wp/2015/04...