The greatest benefit of a supplier day/forum is providing attendees with insight into the buying company's new initiatives and strategic imperatives. This transparency helps align the supplier's efforts with the company's goals, fostering better collaboration and innovation. While other benefits such as seeing product usage (A), benchmarking against competition (C), and meeting the supply management team (D) are valuable, understanding the strategic direction is paramount for long-term partnership and success. References: Supply chain collaboration and communication strategies, supplier relationship management best practices.