Describe customer service?

customer service is a service giving to the customers needs/wants. High Customers satisfaction.

it is a service rendered to a guests or client before, during and after their purchase. one should always be respectful, friendly and professional. customers are to be helped to make informed decisions about the product or service being purchased as well as to experience a positive and satisfactory image of the brand or company.

In short customer services is :

"to identify the extact cutomers needs and then fulfil it at maximum level within limited available resources" 

It can be described as : To generate a level of satisfaction in a person who buys your product or service by educating , guiding and supporting him in its use and living upto his expectations after being served the product or service.

Patience + Product knowledge + Attentiveness + clear communications skills + Use positive language

In retail as a sale person  customer service is making customer to feel WOW byt providing best service.