Actions

Action	What it does
Set priority to	Changes the priority.
Set status to	Open, Pending, On hold or Resolved. Closing is left to people and auto-close.
Add labels, Remove labels	Comma-separated labels. New labels are added to the label list.
Assign to	A person who can see every case in the rule's unit.
Assign in turn among agents of	Round robin among the active people placed directly in that unit (not in units below it).
Assign to the least busy agent of	The same people; the one with the fewest new and open cases.
Put in the queue of team	The case goes in that team's queue.
Assign in turn among members of team	Round robin among the team's active members who may work on cases in the case's unit.
Assign to the least busy member of team	The same people; the one with the fewest new and open cases.
Remove the assignee	Leaves the case unassigned.
Move to unit	The rule's unit or a unit below it.
Add an internal note	A note in Markdown that only your team sees.
Set case property	Gives a data property of the case a value, like Tier → Gold. Unique properties can't be set by a rule (every case would get the same value). The timeline says which rule did it.
Notify by email	The assignee (if nobody: the team whose queue it is in, or else the unit's agents), the agents of the case's unit, or a person.
Set the service to, Put in the queue of the service's support team, Notify the service's owner by email	With Service Configuration. Rules further down the list see the service a rule set.

Plugins can add conditions and actions like these; while the plugin is off they aren't offered, saved ones don't match, and their actions are skipped.

Assigning only picks people who can see the case and may handle it; when a unit's agents are restricted by country, others are skipped. Notifications go only to people who may handle the case; when a unit has no agents, they go to the admins.

[!NOTE] If nobody fits, the case stays as it is and the rule's activity says why, for example "Nobody to assign: no active agent in that unit can see the case".