Delegated administration groups in Salesforce are used to give certain users access to specific functions within the Salesforce platform. For example, a delegated administration group could be created for users who need access to Salesforce reports and analytics. By adding users to this group, they would then have the ability to view and generate reports within Salesforce. Delegated administration groups can be customized to fit the needs of any organization, and can be created by administrators within Salesforce.