In retrospect, multiple employees and analysts say, there were plenty of features and approaches that could have helped Google+ stand out, including a strong focus on mobile and messaging, two areas Facebook had not yet figured out. A suite of standalone apps, rather than a single social destination, might have worked as well. Unfortunately this wasn’t the original proposal. The plan was essentially to out-Facebook Facebook.
For every marketer and SEO strategist evangelizing Google+, there just aren’t the people there. The features are mundane. The SEO benefits are dubious.
And most of all, why would you go somewhere new when all your friends are already somewhere else?