Many people have friends, but it is not always the case where they all share a common ground.
One person may have several sets of friends who do not often co-mingle, or who they wish to keep separate.
It is expected that some friends may appear in more than one friend group at a time.
Some friends may not fall under one particular category.
In that case, it’s handy to create a group with private members only. This way, your contacts do not share information with each other.