In one sentence
A trigger is the event that starts a workflow.
The simple model
Every workflow begins with something happening: an email arrives, a form is submitted, a payment clears, a date is reached, a status changes. That event is the trigger. It decides when the work starts and usually carries the first piece of information the work needs.
Why you care
A vague trigger produces an unreliable workflow. "When a request comes in" leaves open how it comes in and how the system knows. "When a customer submits the returns form" is specific: you know the event, the channel and the data attached.
For automated and AI workflows, the trigger has to be something software can actually detect. A verbal request in a corridor is a real trigger for a human process, but it cannot start an automated one until it becomes a digital event, such as a form entry or a message.
Kinds of trigger
- An event trigger: something happens, like a form submission or an incoming email. Often delivered by a webhook.
- A schedule trigger: a time is reached, like "every morning at 8" or "the first of the month."
- A state-change trigger: an item moves into a particular state, like an order becoming "paid."
A small example
A maintenance workflow was described as starting "when a machine has a problem." That is not something software can act on. The real, detectable trigger is "a technician submits a fault report in the maintenance app." Naming it that way told the team exactly where the workflow begins and what data it starts with.
What this does not solve
A clear trigger does not guarantee clean input. The event may arrive with missing or wrong information. Handling that is part of the workflow, starting with a reliable intake.
