Social Internet of Things (SIoT) recommender systems are designed to enhance the functionality and efficiency of the Internet of Things (IoT) by incorporating social networking principles. They can recommend services, devices, or actions based on the social friendships and interactions between IoT devices and their users. Today, edge-driven, Multi-Agent Deep Reinforcement Learning (MADRL)-based recommender systems offer significant advantages for optimizing friendship paths and improving SIoT network navigability. Utilizing edge computing , these systems process cached services in proximity to their source, thereby improving real-time decision-making and decreasing latency. The edge-driven aspect distributes computational load , reducing central server dependency and enhancing scalability and resilience. On the other hand, MADRL enables adaptive learning from complex SIoT user interactions and network dynamics, ensuring contextually relevant and personalized recommendations. This approach improves network navigability by dynamically optimizing routes and efficiently utilizing network resources through distributed learning . Overall, these recommender systems provide scalable, adaptive, and efficient recommendations, fostering stronger social connections and improving the functionality of SIoT ecosystems. In this article, we have developed an innovative edge-driven, MADRL-based SIoT recommender framework that surpasses the performance of the leading baselines. By leveraging the decentralized processing power of edge computing and sophisticated MADRL-oriented algorithms, the suggested framework significantly enhances the optimization of SIoT friendship paths and network navigability. Extensive experimental results demonstrate that our approach achieves superior accuracy, efficiency, and scalability compared to existing state-of-the-art methods, thereby offering more personalized and contextually relevant service recommendations while reducing delay and improving real-time decision-making in dynamic SIoT environments.