Sometimes you may need to check someone’s hidden friend list because you are looking for someone but cannot find them maybe they are friends with your friend, but you can’t see the hidden friend list because your friend’s friend list is set to private. Also, if someone hides their friend list, the same thing applies to you.
If you hide your friend list, your friend will be able to see mutual friends only.
No wonder Facebook is the most extensive social network today with over a billion users across the world, and Facebook is getting smarter and wiser day by day it gets updates every month Facebook updates security and privacy for user’s profiles, one of the privacy feature added by Facebook lately is to hide your friend list even from your friends.