Kindle Fire Display

I looked at the FAQ on Amazon.com, and could not readily find out what this means:

Next to my name at the upper left corner of the display, there is a number in a circle. It was 2 yesterday, but it was 3 this morning. What does this number refer to?

Notices. Stuff like “download completed” and “USB connected.”

Thank you

“Swipe down” from the top of the screen to see what the notices are, and to get a button to clear them.