Google+ Mobile is an app for Android Phones but soon to iPhones and others that lets you share to Google+ from anywhere. Get updates from your circles in the stream. Do a check-ins from your location to let you friends know where you are.
+1 is just a like button for a webpage or post. + 1’s are displayed on the page or post and also in your profile.
Google Profiles is actually a very old, at least a couple of years. Choose and control what you want others to know about you. You can share more with some Circles than others. Google has made your privacy number one business. You control who sees what. About Profiles Some people including myself are using profiles…
Sparks brings you stories on the things you love from all across the Web. In other words, news feeds on any topics. You may find stores in Sparks that you may want to share in your stream.
Google+ Chat is the same as in the Google Talk client and the Gmail Chat client. Chat is located on the right side just like in Gmail. You can chat with anyone using Google Talk or Gmail. Get Started with Chat
Hangout simply put is video chat on steroids. You can do collaboration, business meetings or just hang out with your friends. It is my plan to do this with the group soon when we’re all at home or elsewhere.
Good-N-Free Meetup 