A lot of easy "tech" work honestly consists of using google to find answers for people who refuse to use google for themselves. It never fails to amaze me. I was born knowing how to change the battery in a 2nd gen Prius keychain remote? LOL no I merely use a google search because you're too lazy to do it for yourself (or learned hopelessness where they're intentionally outsourcing the labor to me and I'm being the sucker)
I would imagine someone who's annual review consists of how well they've SEO'd their page will be enormously more interested in how well they're doing SEO than a kid writing an essay or a possible future customer, or really anyone else at all. Money is a powerful motivator.
I'm pretty sure you don't use Google+.
Compared to other social metric's (facebook, twitter, etc), it's empty.