If you manage lots of Google Plus Business pages on behalf of businesses, likeliness is you will have one account that you have the businesses add as a manager. This is a great way to avoid having to store multiple logins and make sure the business owner always maintains control over the page itself. However there are 2 things that Google’s help article on the difference between Managers and Owners doesn’t tell you:
Email Alerts for New Reviews only go to Page Owners
If you are the page owner, you’ll receive an email if you get a new review on Google. If you manage the page, you will not.
Suspended Messages for Pages Show Only for Page Owners
This one was really new to me. If the listing gets taken down for violating the quality guidelines, the owner account will get a suspended message at the top of their dashboard. The manager, however will see nothing and the listing will simply vanish from their dashboard. I can see why users would be confused when they suddenly have pages disappear from their dashboard.