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Google+'s secret sause continues to be Google+ circles that gives you easy, precise control over who can see, and who can't see, any given post.
If circles don't always work for you Google+ communities enable you to focus on talking about the issues that matter to you. if you follow me, for example, you'll get Star Trek posts as well as Linux stories
If you want to adjust what's happening in Google+, you'll find all its features and controls in a drop-down right-hand menu bar.