The state machine trigger detects events related to the states of the specified state machine. By tracking the states of the steates we can bind animations to them.
A state-machine trigger consists of two properties: State machine name and name of the state.
Conditions are tracked by three trigger modes: Started, Continue, End.
Trigger starts as soon as the specified state machine enters the specified state.
Trigger starts and continues it's working as long as the specified state machine is in the specified state. Upon exiting that state, refered objects stops immediately.
Trigger starts as soon as the specified state machine exits the specified state.
Trigger links from the states of the State machine in Game Flow actually represent a State machine trigger. You can choose to use this event more conveniently.