Final answer:
The 'itil' role in ServiceNow allows users to handle incident, problem, change, and configuration management. It is essential for IT service management processes.
Step-by-step explanation:
The ServiceNow role that enables a user to perform actions related to incident, problem, change, and configuration management is the itil role. This role is crucial for IT service management and grants the user permissions to manage these key IT service processes within ServiceNow.
Each of the other roles listed, such as Procurement_user, Asset, Inventory_admin, and Discovery_admin, serve different functions within the ServiceNow ecosystem, focusing on other aspects of IT service and asset management.