Joe, sorry but the hash tags actually do NOT work on G+ despite what you may have heard. It's not tied to twitter :( However, *BOLD* type for specific keywords does help, as does italics since Google picks them up quickly.
I've found some fantastic G+ "how to" videos on You Tube, helpful tutorials on navigating and using your homepage to your advantage. It works....I am back logged this spring with my basic SLR workshops and the Advanced photography workshops I lead here in Connecticut. I've linked my G+ advertisements right to my "contact" page on my official website, then the E mails pour in.
Some basic knowledge about good SEO is helpful. Some positives: No need to play silly games, dump photos into "discussions", participate in faux contest or solicit votes/likes and faves in groups.
It took me a while to make a mental map of the site. I signed up a little over a year ago, and months later I finally began to upload some low res/watermarked prints. I'm no social butterfly, I log in sometimes only once a week but since last May I've accumulated a humble 650 followers (deleted several hundred along the way/another issue) and approaching 1.5 million views.
Unlike FB, you have full control over allowing Sharing of your post, muting comments, pinning your advertisements to your homepage and deleting/editing any time.