Social platforms.
Used only by the SEO agencies, Google’s feeble attempt to usurp Facebook was loaded with bribes to drive agencies, developers and organisations onto the new platform. And it failed.
On the way, they did succeed in gathering a lot of data, and now a huge percentage of searches are now done from “logged-in” users.
Failed as a social network: Succeeded as a platform to gather and process data. And now it’s dead.
Yesterday’s Google I/O conference was a nice reminder of it’s failure as the social network didn’t even manage a mention, never mind a session.
Not everyone thinks it’s dead, though. Huffington Post seem to think it’s in a coma.