When creating a new application in Appian and opting to generate groups and folders for organization and security, Appian automatically creates specific groups to facilitate application development and management. The default groups include "Administrators" and "Designers" with the application prefix, in this case, ACM. The ACM Administrators group is intended for users who will have full control over the application, including configuration and deployment aspects. The ACM Designers group is designated for users primarily involved in the design and development of the application, granting them necessary permissions to create and modify application components without full administrative privileges.References:

Appian Documentation on Application Design: Offers insights into best practices for structuring and securing Appian applications, including the use of groups for effective application management.