What are the different types of change in ServiceNow, explain each?

There are three types of changes :

1. Standard Change: A standard change is a pre-authorized change that is low risk, relatively common and follows a specified procedure or work instruction.

2. Normal Change: This type of change follows the complete change lifecycle. It needs two-level approvals and must be planned well ahead of time. It usually has a major impact on the business process and overall IT workflows.

3. Emergenency Change: A change that must be implemented as soon as possible, for example to resolve a major incident or implement a security patch. This change is of such a high priority that it bypasses group and peer review and approval and goes straight to the Authorization state for approval by the CAB approval group.