A trigger in the environment that signals a need is an external cue. This can refer to a variety of things, such as a situation or event that prompts a person to recognize a need for a particular product or service. For example, seeing an advertisement for a new phone might trigger a person to recognize a need for an upgrade. Triggers can also be related to emotional or behavioral responses, such as when a student is triggered by an issue or concern that has been left unaddressed or inadequately resolved. In this case, a teacher may need to identify and manage known triggers to interrupt the acting-out cycle before things escalate. Overall, triggers can play an important role in the buyer behavior process and in managing student behavior.