Want to test new Google+ features before they become available to the public? Now you can, thanks to a newly launched Google+ program.
To sign up to be a beta tester, head over to the Google+ Platform Preview page and enter your email address. Any address will work, so long as you’re signed in to your associated Google+ account.
You’ll need to click on a link in a subsequent confirmation email to confirm your entry into the program. After that, Google will email you every time new features are available for you to test out.
Source : Mashable.