What is a token in BPMN?

In BPMN (Business Process Model and Notation), a token is an abstract object that symbolizes the control flow or execution of a process. The token moves through the process diagram elements (such as tasks, events, gateways), reflecting the current state of the process.

When the process is started, a token is created and passes through a sequence of elements, activating them. For example, when reaching a task, the token 'stops' at it until the task is completed, then continues its movement.

Thus, the token helps model and track the execution of a business process, showing at which stage the process currently is.