Despite the fact that it's been available to some people for around a couple of weeks now, Google has only made the Play Family Library feature official today. As we revealed back when it first started going live, this essentially lets up to six people share purchases made across Google Play - be those for apps, games, movies, TV shows, or books. All of these items can be shared on Android, while movies, TV shows, and books can also be enjoyed on the Web and through Google's apps for iOS. There's no additional fee for Google Play Family Library, you just have to set it up. When you do...
Source: http://www.gsmarena.com/google_finally_announces_play_family_library_up_to_six_members_can_share_purchases-news-19641.php
