Google+ has rolled out a message board feature, much like pages, which allows any user to post. While seeming like a standard feature on the surface it may have a significant effect on the success of pages and marketing in general on Google+.
Until now the success of Google+ seems to be down to the ease of news consumption. Circles tend to be shared based on the type of content posted, but no user posts about a single topic 100% of the time and streams can become a mess of content you’re not interested in. Google+ Communities has solved this problem though, letting users subscribe to a topic rather than a user or page.
But the feature of Google+ Communities I’m most intrigued by is the ability for pages to join Communities. From a marketing perspective this is excellent. As long as the Community moderator allows it pages can hop on the back of Communities to spread their word, instead of being faced with the laborious task of building followers themselves.
Techmog has been invited to a couple of Communities (perhaps accidentally) which may signify acceptance of pages into Communities. But only time can tell.