Recently, Google announced the release of their Real Name Verification button for Google +. As of now the it is only available for celebrity, public figures and for individuals who have been added to lots of circles. However there are plans of rolling it out for everyone eventually.
To avoid spam accounts and to provide it's users with real-world like experience Google follows a strict real-world names policy. Elaborating on Google + names policy Google's Saurabh Sharma explains, “we’ve asked that those signing up for the service use the name they commonly go by in the real world.”
With Google's emphasis on being verified with the addition of this badge will make it harder for the spammers to create fake accounts.
However, the downside of this is, verifying your real- world identity could limit your right to free speech and this presents Google + as a rather formal social platform that does not accept diversity.