For example, let's say Nediva is in one of your circles, and Jadon is in one of Nediva's circles. You don't know Jadon and he's not in any of your circles. If Nediva chooses to have Jadon visible on her profile among the people in her circles, and you choose to share with your extended circles, your content could appear in both Nediva and Jadon's streams.
You aren't able to see a complete list of the people included in your extended circles--it's a collection of people that's frequently changing.
EmoticonEmoticon