If someone tries to sell you Google+ as an SEO technique, don’t listen. Google+ and Google Authorship are content-driven. If there are any shortcuts or tricks that bypass content to achieve search visibility, Google will hunt them down and kill them.
If someone tries to sell you Google+ as a brand awareness technique, don’t listen. Google is not widely used by the general public and you have better options … at least for now.
View Google+ as a vital part of your content marketing program — and the rest of your Google+ decisions will take care of themselves.