The site is invite-only at the moment.Google+ is in limited Field Trial, they're testing with a small number of people, but it won't be long before the Google+ project is ready for everyone.Plus lets you create groups of people called "Circles", and you can share stuff among those groups in a more focused way.So while you might share the news that you've got engaged with everyone in all your Circles, the other news - about how your bachelor party ended up with everyone getting drunk and the girl who came to pole dance is also drunk , lying on your friends lap - might just be shared with your Best friends or you can say the people who you wanted to share. There are also "Hangouts", in which Google appears to have invented the chatroom. You can create one, or join one created by ur friend. People can be connected via video chat . Another feature, Huddle, for text chat between circles.There's also instant photo sharing and a feature called Sparks, which offers something new: auto-generated content feeds based on your chosen topics. You tell sparks what you're interested in, and it finds stuff it thinks you'll find like.
Google's also created a Google Maps-style demo you can play with to get to know Plus a little better.
Google's also created a Google Maps-style demo you can play with to get to know Plus a little better.