What is a workflow trigger?

A workflow trigger activates a workflow. 
For example, when a deal's status changes to 'Negotiation', you can use a workflow to schedule a meeting automatically with the contact by creating an event in the CRM. 
In this situation:

• The status change is the trigger
• Status = Negotiation is the condition
• The creation of an event is the action

To learn more about workflows, click here.