All I can say is use it! DO NOT under ANY CIRCUMSTANCES leave it blank.
This box is your opportunity to talk yourself up. Some ideas of things to put in there:
- Certificates of everything relevant
- Extra qualifications
- Volunteer work
- Your course weighted average, I only suggest this if it is more than 80
- Put in quotes of things your facilitators have said about you in your NCAS. Things that highlight teamwork, critical thinking, problem solving, using correct procedures etc.