Simple definition
An IT service catalog describes available IT services, eligibility, request channels, and the conditions under which they are delivered.
Purpose and use
A service catalog describes services offered to users and conditions for requesting or using them.
How does it work?
It can state eligible users, prerequisites, request steps, responsibilities and agreed times using language suited to business needs.
Example and verification
For a useful entry, verify that users can identify the service and supply necessary information without knowing internal technical organization.
Points to watch
A server or tool list is not automatically a user-understandable service catalog. Outdated commitments can create misleading expectations.
In short
The catalog should connect actual offerings, request journeys and the provider's fulfillment capacity.