General name for after-sales activities aimed at business or private customers, buyers or clients. Includes services in the field of delivery of products or services, including logistics, warranty, aftercare, support, invoicing, upgrading, maintenance, advice, information provision, sales, customer retention, relationship management reservations, etc. In some cases specialized in the form of, for example, a ( technical) helpdesk.
Customer service is often a department that carries out multiple processes, including customer contact (front office, contact center) On back office, but sometimes also financial administration or fulfilment.
Other indications: customer service, helpdesk, customer support, customer contact center.