Explanation
The In Jeopardy field on the Service Appointment is a checkbox that indicates whether a service appointment is at risk of late completion based on travel time and service duration calculations. Technicians can update this field using the Field Service Mobile App to alert dispatchers and managers of potential issues. Posting to the Service Appointment Chatter feed, changing the Status field on the Service Appointment, or adjusting the Scheduled End field on the Service Appointment would not indicate that a service appointment is in jeopardy, but would communicate other information such as comments, progress, or rescheduling. References:
https://help.salesforce.com/s/articleView?id=sf.fs_service_appointments.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.fs_mobile_app_overview.htm&type=5

Explanation
Field Service Lightning Admin Permissions are required to set up new territories, define new schedule policies, and control settings on the Gantt chart. These permissions allow users to access and modify field service settings and objects.
References: https://help.salesforce.com/s/articleView?id=sf.fsl_permissions.htm&type=5

Explanation
Skills are used to define the level of expertise that a resource has for a specific type of work. Skill requirements are used to define the level of expertise that a service appointment needs. Resource skills are used to assign skills to resources. By setting up these components, the system can match service appointments with resources based on their skills.
References: https://trailhead.salesforce.com/en/content/learn/modules/field_service_basics/field_service_skills