First, let’s clear up the biggest misconceptions. Steam Family Sharing does not allow you to purchase one copy of a game and then share it with all your friends.
There was a lot of confusion over what exactly that entailed during the beta test and, fresh off the public release, there’s still a lot of confusion over what exactly Family Sharing does. RELATED: How to Enable Family Options (aka Parental Controls) In Your Steam Client Steam Family Sharing is a new feature in Valve’s Steam game distribution network/client that allows you to share your personal game library (the games you have downloaded/purchased from the Steam service) with friends and family.