ServiceNow Exam CIS-CSM Topic 6 Question 7 Discussion

When your mobile device is offline, you can execute assigned tasks at the task location, manage assets, track the time stamp of updated tasks, and close work orders and work order tasks. The data for tasks performed offline is stored in the device cache and synchronized when the device goes online.

https://docs.servicenow.com/bundle/madrid-field-service-management/page/product/field-servicemanagement/concept/mobile-experience-fsm.html