What is the meaning of You Have A New Friend Suggestion on Facebook notifications?

Facebook reviews your friends list and the friend lists of others and looks for possible mutual friendships.

Also, if you’ve allowed it, it will periodically trawl your phone contacts and then offer up suggestions on Facebook for friending.

It then presents those to you as “suggestions” figuring that you may know them.

As you can tell, it doesn’t always get it right.

 Friend suggestions are appear on base of your friends, location, interest,study, college, year of education and your profile details. Below details will make this more clear.

1. Friends of Friend : if your friend have common conection with some one then it may appear to your suggestion feed.
2. College & year of Study : Facebook identify the people who studying in same college or school in same year. so if there is some one who entered same details as yours then there is a chance that you will see their profile in your news feed. Interest :
3. Location : Facebook also shows suggestion on base of location i there is 2 profile which shows that they both are in same city for so long then there is a chances that they know each other and Facebook shows suggestion on base of it.
4. Family & Relatives : same as friend if you have added any of your family member in your list then there is a chances that family members of that person will also see your profile in their suggestion feed.
5. Interest : some time Facebook also shows this suggestion on base of your interest if there is multiple sugestion then the best pair as per your interest will be shown to you.

However you never know the exact reason of why some one else profile appear on your suggestions feed but it is sure that the one of the above reason is working behind that.