What do Circles do?
Google+ Circles help you organise everyone according to your real-life social connections. Create circles for every group of people in your life from family to music buddies or graduate association. Then you can share relevant content with the right people and find the content that you’re interested in. Circles allow you to share an engagement announcement with just your friends and family circles or find a post from a friend from your book club circle about a great new author.