Customer service is the fulfilling right expectations of customer when he buys the product. When customer buys any product he may not be aware about the use of product or may he gets some issues with the product. So resolving queries or educating about product this could be the goal of a customer service. It is as simple as the example of our own. When we buy any product we get queries, and if there is no one to resolve our queries, we either throw the product away or get frustrated. A good customer service is a good way to grow the business.