The Customer Management service handles customer, company and company group entities, as well as performs authentication and authorization on customers. The service is generic (Keycloak)
Customer Management represents entity that can place orders, manage associated users and assign profiles to groups. A group is a business concept that can allow modelling of things like company structure, or categorization of profiles into groups of different customers. In B2C a profile is usually a private entity, whereas in B2B it is always a company.