I collected some articles showing the benefits of google+ hangout. Here they are:
Meet with clients without leaving the office.
Integrate these tools with you other efforts.
Now ready? Let's do the hangout.
1. Create your gmail account. If you have already your google+, just proceed to step 2.
After you successfully created your gmail account, proceed to google+, then search and
add friends to your circles.
2. In the left side bar of your google+ home, find Hangouts under More. Click Start A
3. Install Plugin.
4. Now you're ready to go! Invite friends inside your hangout. Explore the features. You
can Off / On your camera and microphone. You can have the Group Chat. Screenshare
is best for slideshow presentation!
I prepared also this tutorial "creating a google+ hangout" in a video.
It's Hangout Time! See you soon in one of your hangouts!