The much awaited Google + communities was launched 2 weeks ago with not so much or much fanfare. It lets users, brands, coproates to get together at one place to discuss issues of common interest. Hangouts and engaging in discussion as in circles is possible in G+ communities. Google+ and Google+ communities are a way in which users contribute to Google capturing data. It has the biggest impact on adverts and search results.
Google communities as Google+ was created in haste. The code of G+ Circles seems to have been copy/paste into communities with slight modification.
The real question is whether Google+ communities will survive or not. The survival question is not of death from Facebook groups or any other. If the communities need to survive, it really needs to be different from circles, Google groups and Facebook groups. Currently the communities are another name for Google Groups and almost same as the Circles. Popularity of G+ communities should not be by some politician running their campaign or someone of social stature it should be moved forward with the users who built G+ circles.
Given time if G+ Communities do not move from kindergarten its going to be another BUZZ.