A more thorough explanation:

Definition: A duty that requires neither the exercise of official discretion nor judgment.

Example: A police officer directing traffic at an intersection has a ministerial duty to follow established traffic laws and procedures. They do not have the discretion to make their own decisions about how to direct traffic.

This example illustrates that a ministerial duty is a specific type of duty that does not involve decision-making or judgment. Instead, it involves following established rules and procedures. This type of duty is often found in government or official roles where there are clear guidelines that must be followed.