The same was with me when I first started using Facebook.
The social connection between people has increased tremendously after the invent of 
Facebook. People are spending a major time of their day on these social networks.
Many of us must be on facebook right now while viewing this article also, which shows
 the craziness of this social media on the minds of people. Being such a large audience
 on facebook, the service has increased a lot which makes a user happy on visiting that 
site and freshens its mind.
On the try to make the site easier, there are several terms on facebook which are not
 known by users at large. Those terms are so complicated which makes the user faints
 while thinking of that. Such a word is “Mutual Friends“.
A large number of facebook users doesn’t knows what Mutual Friends is. They just
 assume some similar meaning like “Best Friends” or “The Best Friendship” on
 facebook. Sounds funny, right?

So, what does the term “Mutual Friends” exactly means?

THE TERM MUTUAL FRIENDS

 REFERS TO THE LIST OF 

COMMON 

FRIENDS BETWEEN TWO 

              FACEBOOK USERS.                             

Explaining it in detail, Mutual Friends is the list of friends that two facebook users 
have in common. The first person is you yourself and the second person is the one
 whose profile you are viewing.
This means that, when you are viewing a profile of any of your friend, the mutual
 friend is the list that you both the friends have friends in common. Sounds confusing, 
but it’s too easy.
Let us take an example like your name is Peter (assuming) while your friend’s name 
whose profile you are viewing is Charlie (again assumption), then mutual friends
 are the friends list that both Peter and Charlie have in common. This lets us view 
how many  friends we have in common.
The main purpose of showing this list of Mutual Friends may be acknowledgement of 
common friends between two facebook users, so that they can know whom to trust and
 whose profile is fake.
Facebook explains the definition of Mutual Friends in short as in the picture below.
what are mutual friends on facebook
So, this makes the term “Mutual Friends” very clear along with different sorts 
of examples.Do comment your experience and assumption about this term in the
 comment box below.