Google+ is like Facebook, except that it allows a person to share information with certain groups, called circles. When you post something to Google+, you can decide which circles will see your post.
I haven't used Google+ a whole lot yet, but I hope to become more familiar with it. Google+ is very widely used with educators from around the world.
Recently I discovered an awesome feature of Google+ called Google Hangout. Google Hangout is used to hold a video conference with up to 10 participants. I participated in a Google Hangout with a group of educators to prepare for the SLATE Flipped Classroom Workshop.
This was a great experience that connected me with people I had never met before. The video conference was easy to join and I like the format. When a person is talking, they show up in the large video at the top and the other participants are at the bottom.
I highly recommend joining Google+ and Google Hangout a try!