The Score Card pane tallies the number of clarifications in each state.

For an ICM or PD it is a good place to start a session of answering clarifications as it will tell you the number that await you.

The score card is also a navigation aid.  If you click on the name of a challenge, it will take you to the Private Clarifications pane for that challenge.  If you click on the count at the intersection of a challenge and a status, you will be taken to the Answer Clarifications pane displaying the clarification in this state.