Below is a list of Google+ top features:
Circles - this is how Google+ organizes people you're connected with. Similar to groups in Facebook but way easier. Just drag a friend to a Circle and you're done. You can control the information you share based on the Circles you make. You can also control the information that you see depending on how you organize your Circles.
Example: You have 2 Circles, Friends and Family. When you want to post something (an image or something) that you want only your Family to see, just post it on your stream and select your Family Circle as the intended audience. Once it's posted, only contacts that are in your Family Circle will see your post. Nobody in the Friend Circle will be able to see it.
Real-time Stream - Updates (from the Circles you allowed to show up on your stream) will show up real-time on your stream, no need to refresh your browser. Mobile app still has to sync though.
Hangouts - let's just say, it's video conferencing from Google. Unlike Facetime, you can do a video call for a group, not just 2 at a time.
For an Android user, having a Google+ account and the Google+ app on your mobile device will help you get your (social) life organized.
I found the following stuff helpful if you own an Android phone and are connected to Google+.
(Some features might be from the upcoming Andriod 4.0 update-Ice Cream Sandwich)
Contacts - Google+ syncs directly on my phone. I don't have to enter contact details for a friend into my phone as long as we are connected in Google+. If the person opted to share his/her contact information with me, then there's no need to enter those information. If that person changes his/her email address, mobile number or even their name, it will automatically show up on my phone. There's no need to tell me you changed those information.
Google+ Messenger - standard instant messaging from Google+. Other that functioning as a typical message app, it also now supports Hangouts on the phone (think, Facetime for Android). You can also open conversations for whole Circles or some select contacts. The Hangouts feature can be better than Facetime because: you can do Hangouts over mobile data and you can have up to 9 participants on a Hangout. Video conferencing on the go.
When your device do get the Ice Cream Sandwich update, then all these services will be more connected. You can start a messenger with someone through the contacts app or through the Google+ app. Control the information you receive on your phone via Circles. Organize events using Google Calendar which also syncs up with Google+. No need to remember someone's birthday as long as they opted to share it with you. It will automatically sync to your calendar.
Do give Google+ a try and you might even think of leaving Facebook for this.

