What are the status options for "Triggers", and what do they mean?

A trigger has three statuses:

• In Development - Trigger only responds to actions by administrator users.
• Deployed - Trigger responds to actions by all users.
• Inactive - Trigger is "turned off" and does not respond to any user's actions.

When changing the status of a trigger using the change link you will see one or more of the following "Yes" buttons:

• Yes, Deploy it
  • This option sets the trigger's status to "Deployed".
• Yes, Deactivate it
  • This option sets the trigger's status to "Inactive".
• Yes, Undeploy it
  • This option changes the trigger's status from "Deployed" to "In Development".
• Yes, Activate it but don't deploy
  • This option changes the trigger's status from "Inactive" to "In Development".