Team Goals allow a manager (e.g.) to create a goal for their team without being accountable for that goal (it will not display in the creator's goal plan).
It supports the ability to share assignment distribution over the team goal – effectively allowing a manager (owner) to share the team goal they created to another manager (co-owner) that may assign the team goal to their own team.
Team Goals were designed using the existing Group Goals 2.0 framework. Therefore, whatever is supported today in Group Goals 2.0 is supported for team goals. There are no separate XML tags for Team Goals.
To learn more about Team Goals, watch this video.