In any group category, you can arrange the groups in a high-to-low priority. A candidate member object is compared against the highest priority group first and becomes a member of the first group for which there is a criteria match.
The Priorities tab shows groups in the order of their priority, from highest to lowest.
To change the priority of a group:
In the Priorities tab, select the group for which you want to change the priority.
To change its position relative to the other groups, click the up or down arrow.