Final answer:
The "!!" icon on the MAR usually signifies that there is an overdue dose for a specific medication order, alerting healthcare professionals to address the issue.
Step-by-step explanation:
The "!!" icon seen on the Medication Administration Record (MAR) typically indicates that a dose for this order is overdue. This is an alert for healthcare professionals to review the medication order and take appropriate action to ensure the patient receives the required medication in a timely manner. The MAR is used to document the administration of drugs to patients, and such alerts are crucial for maintaining proper medication schedules and patient safety.