What component must evaluate to true for a flow to execute?

For a flow in ServiceNow Flow Designer to execute, a trigger must evaluate to true. A trigger is the initial component that starts the flow based on specific conditions or events occurring in the system. This can include actions such as the creation, update, or deletion of records, or specific conditions sometimes called 'event-driven' triggers that need to be met for the flow to activate.

Without the trigger evaluating to true, the entire flow will not initiate, meaning that none of the subsequent components—such as actions or conditions—will come into play. Conversely, other components like actions, conditions, and responses play roles after the flow has started but do not initiate or allow the flow to be executed by themselves. Therefore, having a valid trigger is essential for the execution of a flow in ServiceNow.