I got my first rubber band for my braces today. I only have one, from the right upper rear tooth (#7) to the front lower teeth. It makes eating on the right side a pain in the butt.
The idea is to pull the lower teeth back so my bite is correct.
On the good news front, my teeth are moving so well, we skipped a wire. I am now on my final wires, unless they decide from xrays some other root movement is needed.