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Google + is a combination of Facebook, Twitter, and Linked-In. It is not a replacement for Facebook at this time.
- The Circles increase privacy. It is the strongest feature of G+, adding a better illusion of privacy. Circles feature allows privacy for people within a circle. Not everyone needs to see everything.
Some Circles are pre-started. A Circle is a group; you can add other Circles as you see fit.
- You can people to multiple Circles.
- You can post content then to specific circles.
- Currently, the people in a Circle do not know you have them in a Circle. Could Google change this later?
Google+ is integrating with Google Search. This is significant given the collapse of Google's deal with Twitter for real search.
After the initial traffic boom, it seems G+ traffic may be declining. It does not seem as demographically diverse (a lot of male Caucasian, computer "geeks" was the suggestion made. Note, this may have changed now that G+ is more open). G+ is 65% male, and 7 of the top ten professions for folks in it are in technology.
Note that there is no connection between the G+1 on websites and getting a +1 on your G+. In other words, this does not seem to work like Facebook "likes." There is no integration, which may be an issue. It shows that G+ is not really talking to other networks.
- However, there is a little war going between Facebook and Google. Facebook makes it easy to import contacts and other information from other places and services. However, Facebook does not reciprocate. Thus, Google closes off to Facebook on this. Facebook even blocked G+ invitation links.