I'm on a Mac and CC 2017 photography subscription
about a month or so ago, a little blue spec started appearing in the lower right corner of my CC icon in the menu bar (from time to time).
What does this mean? I've looked at each category of the CC drop down and nothing seems to show something new etc.
it may mean updates are available. attach a screenshot for more info.
correct, those are sync indicators.
The Green check marks are indicated that the particular file has been synced successfully and the blue arrows mean that the file is still syncing.