Minecraft wiki entry for team, associated text: A specific option to change.
Value must be one of the following:
displayName: Set the display name of the team.
color: Decide the color of the team and players in chat, above their head, on the Tab menu, and on the sidebar. Also changes the color of the outline of the entities caused by the Glowing effect.
friendlyFire: Enable/Disable players inflicting damage on each other when on the same team. (Note: players can still inflict status effects on each other.) Does not affect some non-player entities in a team.
seeFriendlyInvisibles: Decide players can see invisible players on their team as whether semi-transparent or completely invisible.
nametagVisibility: Decide whose name tags above their heads can be seen.
deathMessageVisibility: Control the visibility of death messages for players.
collisionRule: Controls the way the entities on the team collide with other entities.
prefix: Modifies the prefix that displays before players' names.
suffix: Modifies the suffix that displays after players' names.