Google+ rolled out a new feature that let users to share who’s in their “circles”.
Google Plus has become a way for people to follow favorite celebrities, talking heads in certain fields and other interesting folks, and users have been asking for a way to share those groups with one another. Users can now do that by choosing a circle from Circles tab and clicking “share this circle” option. Users can decide which circles they want to share that information with.
When you share a circle, you only share who’s in it, and not the name of the circle. So if someone is in your “Acquaintances” circle instead of your “Friends” circle, they’ll never have to know. Even if you share a circle, all subsequent edits are private.