Providing multi-modal approach in trouble shooting, this is a help desk. Help desk is a service carefully designed to contact customers of IT users. Technical help desk varies among companies. Technically speaking, it is indeed a support for the external and internal users of the networks operation system and applications.
Trade and business isn’t completed with the customer’s consumption of product or service, sometime in the future after the purchase, customers will need another service which will help him through his consumption. It may be a technical and procedural assistance regarding the purchased product or software.