Service Territories are used to group resources and service appointments based on geographic areas or other criteria. The recommended limit for service appointments per territory per day is 500 for optimal performance and user experience. References: https://help.salesforce.com/s/articleView?id=sf.fs_territories.
htm&type=5https://help.salesforce.com/s/articleView?id=sf.fs_limits.htm&type=5

Skills are used to define the level of expertise that a resource hasfor 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

Attaching relevant articles to the work order or work order line items allows technicians to access them offline using the Field Service Mobile App. Creating a quick action on the work order to search the Knowledge base would not ensure offline access, as it would require an internet connection to perform the search. Updating the Service Appointment page layout to include the Articles related list or adding the Knowledge Lightning component to the Field Service Mobile App would not be effective, as technicians use the Work Order Line Item Card in theField Service Mobile App to view their assigned tasks. References:
https://help.salesforce.com/s/articleView?id=sf.fs_mobile_app_overview.htm&type=5https://help.salesforce.
com/s/articleView?id=sf.fs_work_order_line_item_card.htm&type=5

This option allows visualizing the planned travel route for a technician on a map, based on the street-level directions and traffic conditions. References:https://help.salesforce.com/s/articleView?id=sf.
fs_street_level_routing.htm&type=5

These two settings ensure that each inspection is completed within a single visit and includes all installed assets on site. References:https://help.salesforce.com/s/articleView?id=sf.fs_maintenance_plans_overview.
htm&type=5