View a specific Circle's stream.
On the volume control slider, click and drag until you get to the far right with the bell (notification) icon.
Get notified every time someone from that circle posts.
Get Notified When People Post on Google+ | Peter G McDermott
Get Notified When People Post on Google+. How to Create a Subscription Circle on Google+. Google+ gives you the opportunity to sort your contacts by interests, topics or whatever you would like. You c…