First, let me state that i grabbed this off of the valve developer site wiki, but will be modifying it later on so that I can say at least I did something to original with it.
This is a Task List that will display what you need to accomplish in that particular section of CI.
These tasks could be simple, like picking something up, or complex, such as finding all of the power couplings and connecting power cables to them.
Right now there are only 4 Tasks maximum for the list, I will be increasing this to a larger number that's yet to be determined.
There are 2 visible priorities, low/medium and high. low/medium tasks are yellow while high priority tasks flash for a few seconds and are red.
I will be adding a new priority or two and changing the color for low to something else.
Once a task is completed it turns green then is removed from the list after a short while.
Later on in development this might also track what you are doing, like if you have to kill eight guards, it will write up how many guards you have killed so far.