Search and social marketers take note: Google may soon add to its 90 million users as it simultaneously pushes unification of its services, requiring new users to make Google+ accounts.

The Google Operating System blog recently reported that those looking to create accounts on any Google service must also make a Google+ account as the company continues to integrate all of its services into one platform. For marketers considering the platform for social media marketing, the fact that all new Gmail or Picasa users will have Google+ accounts may provide a strong impetus to get started.

This news comes shortly after Google CEO Larry Page reported that the platform now has more than 90 million users (rapid growth over December, when Brafton reported it had an estimated 62 million users). As part of Google’s Q4 earnings release, Page said that the company is actively working toward unifying its offerings to provide a more seamless web experience for its users – and mandatory Google+ accounts seem to support this goal.

By requiring new users to enroll in all services, they can access Gmail, YouTube Google+, Docs and other parts of the platform with a single login. Moreover, marketers can ensure that the content they produce across each of these channels reaches prospects on multiple fronts, allowing for multiple touch points.

Google+’s integration with Gmail may ultimately be its single most important and differentiating factor for businesses considering it. Brafton recently reported that email campaigns integrated with social sharing options resulted 115 percent greater engagement than those lacking social .

Joe Meloni is Brafton's former Executive News and Content Writer. He studied journalism at the University of Massachusetts, Amherst, and has written for a number of print and web-based publications.