These documents provide a detailed breakdown of how the system should function and its technical implementation. The FSD outlines the specific functionalities the system must perform, detailing user interactions, system behavior, and data flow. The TSD goes deeper into the technical architecture, defining how these functions will be implemented using specific technologies, databases, servers, etc. This service bridges the gap between business requirements and the technical team, providing clear guidance for developers on how to build the system according to business needs.