First, Google Plus has more users than you think. Yes, it pales in comparison to Facebook — but so do most other social sites. Rather than trust Google’s own user data, we decided to run our own survey. We asked more than 60,000 US online adults which social sites they used — and 22% told us they visited Google Plus each month. That’s the same number who told us they use Twitter, and more than told us they use LinkedIn, Pinterest, or Instagram. That means you can build a real follower base on Google Plus: On average, top brands have collected 90% as many fans on Plus as on Twitter. (In fact, the brands we studied have more followers on Google Plus than on YouTube, Pinterest and Instagram combined.)
Second, and more importantly, Google Plus generates much more brand engagement than you think. Recently we studied more than 3 million user interactions with more than 2,500 brand posts on seven social networks. The result? Brands’ Google Plus posts generated nearly as much engagement per follower as their Facebook posts — and almost twice as much engagement per follower as their Twitter posts.

Why Every Marketer Should Use Google Plus