Ever wonder what that little flap is with the + sign? This is where you can add a little reminder about a particular status, or a quick note and mention someone. It's great to see something related to that status in a moment's notice!
Let's take for example - Task 3 "Working on it" and I add in text - "Where are we on this?" in the status box.
Then I change the actual status to read "Done."
The text "where are we on this" still appears inside the pulse even though the status box is now changed to Done.