Child Theme and Jetpack CSS editor
Ok, I'm new to this WordPress website creation process and I understand the need for the child theme and have set that up. I've also installed a plugin called Jetpack which has a CSS editor and I wanted to know it I use that does that eliminate the need for the child theme as far as CSS changes go? Or should I be changing the CSS code in the child theme folder (twentytwelve-child) OR BOTH? Confused. Also, do I just keep adding to the preexisting changes any further changes and doesn't the order of these changes count for anything?