What is the role of a trigger in Flow Designer?

The role of a trigger in Flow Designer is to initiate a flow based on specific events or conditions. Triggers are essential components that define when a flow should start its execution. This could involve responding to various conditions like record changes, specific field updates, or even events like approvals or incidents being created. By using triggers, users can automate processes that are directly tied to these events, enhancing operational efficiency and responsiveness.

In the context of Flow Designer, this function is crucial for ensuring that workflows are activated precisely when needed, allowing for timely actions to be taken. Without triggers, flows would not have the defined starting points necessary to function effectively within the automated environment ServiceNow provides.