Which Salesforce standard license can be given to someone who need access only identity services,...

Identity Only is the Salesforce standard license that can be given to someone who need access only identity services, such as single sign-on (SSO). Lightning Platform, SSO License, and Salesforce License are not valid standard licenses in Salesforce. References: https://help.salesforce.com/s/articleView?id=sf.users_license_types_available.htm &type=5