I've noticed that some apps have a blue dot on the left side of the app name under the icon. The blue dot comes and goes. Yesterday I had one next to my DropBox app and today I have a dot next to my Shazam app. Not only that, but today the dot next to my DropBox app is gone. Below is a snip of four icons from a page on my iPad Air screen. You can see the dot next to the Shazam app. What in the world does the blue dot signify?