Final answer:
Good customer service refers to high-quality assistance provided to customers. External customers purchase goods/services. Internal customers rely on assistance/products within the organization. Bad customer service refers to poor assistance.
Step-by-step explanation:
Good customer service refers to the high-quality assistance provided to customers, which includes prompt responses, problem resolution, and a positive attitude towards customers' needs and concerns.
External customers are individuals or organizations who purchase goods or services from a company, such as the end consumers or other businesses.
Internal customers are individuals or departments within an organization who rely on the assistance or products provided by other members or departments within the same organization.
Bad customer service refers to the poor quality assistance provided to customers, which includes rude or unhelpful behavior, long response times, and failure to address customers' concerns effectively.