Effective Customer service
Customers want satisfying experience not and rushed one. Companies that provide it will win their loyalty. The dangers of getting it wrong is that the customers will stop using their business. Also if they have good customer service and keep the good customer service levels up they can make more profit from it.
Advantages of good customer service is that they can gain more customers, keep customers, more profits and much better reputation.
Disadvantages of poor customer service losing customers, losing potential customers, loss of reputation, loss of employees and loss of profits.