Google plus has recently gone through a few changes. They are now showing view counts as well as followers. The views are actually the number of times your content has been seen by other people. This includes your photos, posts etc.
The idea behind this it is to increase engagement. Up until now, it was all about "follower count" like you see on Twitter or Facebook. But Google knows that rewarding follower counts only creates spam and other tactics where people just try to boost their followers to look good.
But views are more engaging and show real interaction. It's harder to game "views" on your posts. You actually have to be working with and talking to people who in turn view your stuff.
Look at our counts in the attached - we have a lot of views but not many followers.
See how that tells the real story? Not everyone will want to "follow" you, but they do like to "view" your updates.
What should a business do? Get active on Google Plus. Interact with others in your area. Share their content, and engage with them.
Trust me, google will very soon (if not already) start using these metrics as signs of "authority" for all of your content.