0 Google plus project unveiled: can Google challenge Facebook

Google has finally unveiled Google+, the company’s top secret social layer that turns all of the search engine into one giant social network.Google+, which begins rolling out a very limited field test on Tuesday, is the culmination of a year-long project led by Vic Gundotra, Google’s senior vice president of social. The project, which has been delayed several times, constitutes Google’s answer to Facebook.

It has mainly 3 parts 

Circles

The easiest way to share some things with college buddies, others with your parents, and almost nothing with your boss. That’s where Google+ begins to diverge from Facebook, though. The focus of this social project is not on sharing with a mass group of friends, but on targeted sharing with your various social groups. To do this, Google uses a system called Circles.

Hangouts

Let friends know you're free for a video hangout, any time, anywhere. Then catch up, watch YouTube, or... just hangout.

Sparks

A feed of just the stuff you're really into, so when you're free, there's always something waiting to be watched, read, or shared.

Also have other social network facilities just like...Photos & Group Video Chat