This is your "impact statement" to win them over in all terms not necessarily work related. For instance; you run the youth organization at your church, you organized a charity drive that was successful in providing toys to 100 needy children at Christmas, you were successful in the spaying and neutering of over 50 pets in your town, etc.
Or you could be a little more down to earth, you are a dedicated husband/wife and mother/father to XXX and you are proud of your children, puppy, flower / vegetable garden, or maybe you just enjoy drinking coffee on the porch and watching the sunrise in the mornings, etc.
I think its not necessarily what you say here....but
how you say it...that helps you..IMHO. If you have confidence, a warm but confident smile, it will show them you are comfortable with yourself and yet you are not overly cocky but just enough that you have the goods to absolutely kill for them and represent them well in the process.
I typically didn't know what the hell i was talking about in interviews, but i was confident enough that i was able to bullshit my way through it with all of those magical elements like posture, eye contact, conviction in my voice, etc. One time i even went to an interview for a promotion that i really didn't want, i was going through the motions for the experience, i told the managers in that department that "i really didnt like long meetings". They exchanged glances, this job was well known for long drawn out meetings with upper management, i thought to myself there's no way i get the offer. I was shocked later on to find out they wanted me, apparently they appreciated my honesty.
<- i would not recommend saying that.....however!
Interestingly enough, when i was the one conducting interviews, i often found myself looking for someone a little bit like...me. Anyone could be trained to do the job...i wanted someone with the balls to not just do the job....i wanted someone willing to part the sea and shoot the moon if necessary.
Just my opinions though....every situation is kinda different....im sure you will do fine.