The document discusses the service marketing triangle, which emphasizes three coinciding elements: internal marketing, external marketing, and interactive marketing. Internal marketing involves training and motivating employees, while external marketing focuses on promotional activities and pricing strategies to attract customers. Interactive marketing is where the promised service is delivered to customers by employees. The premise is that taking care of employees through internal marketing makes them more likely to satisfy customers through interactive marketing, who were originally attracted by external marketing. Following this service triangle is important for business success.