The term refers to speaking honestly, without causing any power-related conflict. It is believed to help in both expressing ideas and listening to the other person's point of view.
In order to communicate nondefensively, it's suggested to identify and state the situation, describe feelings and request the person for a change in behaviour.
Commas are used when listing 3 or more things and when adding details to something (like saying "Jennie, my little sister" or "Tom and Brent, my best friends").
