Jade Wang from the Google Maps My Business team announced in the Google Business Help forum that they have a new way of showing data update discrepancies between what the owner (you) submitted versus what other sources have said about your business recently.
Jade explained that Google uses both your submissions and "user reports and licensed content" to make sure the Google Business data is as updated as possible. Jade said, Google depends "on business owners to provide high quality, up-to-date business information." But if Google suspects otherwise by receiving "reports of incorrect or outdated information in a location, you may notice a “Google update” to that location" in your My Business dashboard.
How can I identify a location that’s got a Google update?
A location that has a Google update is still live and still in your account. The location’s status will show as Live, but it will also indicate how many updates have been applied.
How can I review a Google update?
You can review a Google update by clicking on the specified location, and then comparing the data that you’ve provided (left column) with the data that’s live on Google (right column). You can review or correct the information until it’s accurate, and then click Submit when you’re done.
More on how this works is over here.
Forum discussion at Google Business Help.