Which type of report can provide insight into security group assignments for users?

The option that provides insight into security group assignments for users is the "View Security Groups for User" report. This report is specifically designed to show which security groups a particular user is assigned to, which is crucial for understanding the access and permissions that user has within the Workday system. By utilizing this report, administrators can quickly assess a user's security roles and how they align with organizational policies, ensuring appropriate access levels and compliance with security standards.

While other reports may offer valuable information regarding user activity or broader security group details, they do not focus specifically on the assignments of security groups to individual users. Hence, they would not provide the same level of detail or targeted information that the "View Security Groups for User" report delivers.