Georgetown question: disscussion of "Significance"

Georgetown requires applicants to "discuss the significance to you of the school or summer activity in which you have been most involved".

Should I focus on the SIGNIFICANCE, or should I first describe the activity?
If the former, does Significance mean its importance and its influence on me?

Thanks!

They want you to evaluate how important to you and to the outside world the activities you spend your extra time doing are. You will need to briefly describe the activity before delving into its significance, but don't spend a lot of time telling detailed stories about assorted times you've done this activity.

Significance means its importance to you and your life, as well as its influence on you and the way you live your life. It also means how it impacts others; for instance, if it is a volunteering activity, you should also focus on the significance (importance) of your donated time to the people it directly effects. What makes this activity so important to you and those around you? Why is it important to your world?

I hope this helps you get started.

I just finished an essay responding to this prompt. Now I'm pretty sure I have got way off the subject...
Thank you very much. This helps a lot.