Logistics service is the perception and evaluation of the logistics activities by the products and customers. It can be influenced by the factors of availability, accessibility, convenience, timeliness, accuracy, courtesy, and professionalism. Availability is the extent to which the products and customers can obtain the logistics services when and where they need them, such as inventory availability, delivery frequency, and service coverage. Accessibility is the ease and simplicity of the products and customers to access the logistics services, such as order placement, payment, and information. Convenience is the comfort and convenience of the products and customers to use the logistics services, such as delivery options, packaging, and returns. Timeliness is the promptness and punctuality of the logistics services, such as order processing, delivery speed, and service response. Accuracy is the correctness and completeness of the logistics services, such as order fulfillment, delivery confirmation, and invoicing. Courtesy is the politeness and respectfulness of the logistics services, such as customer service, feedback, and complaints. Professionalism is the competence and expertise of the logistics services, such as knowledge, skills, and certification. The trade-off between logistics service and costs and quality is that enhancing logistics service may increase the costs and compromise the quality of the products and customers, while reducing logistics service may decrease the costs and improve the quality of the products and customers. The synergy between logistics service and costs and quality is that optimizing logistics service may decrease the costs and enhance the quality of the products and customers, by creating competitive advantage, differentiation, and value proposition.