Good customer service is essential for customer retention. Luckily, training for effective customer service is available through online courses. Customer service is necessary in every business and training to make sure that it is handled properly can be crucial to the success of businesses. Online courses can teach students problem solving, service techniques, communication, how to build an effective department, telephone customer service, and how to handle difficult customers. These strategies will work as well for the beginner in customer service to the service specialist.