An SLA definition is used to create and progress SLAs, enabling you to use an SLA system for your organization's tasks.

An SLA definition record defines the timings, conditions, workflows, and other information required to create and progress task SLAs.

For example, the default Priority 1 resolution (8 hour) SLA Definition defines the Task SLAs to attach to incidents with a P1 - Critical priority, specifies appropriate conditions for those Task SLAs, and uses the default SLA workflow to create events such as to send a notification, when an incident's Task SLA reaches 50% of its allotted time.