How do I train staff on discount policies and procedures?

As a growing e-commerce business, I'm struggling to create a consistent approach to implementing discount strategies across my team. Our staff lacks clear guidelines on when and how to apply discounts, which leads to inconsistent customer experiences, potential revenue loss, and confusion during sales events. I need a comprehensive training program that ensures every team member understands our discount policies, can explain them confidently, and applies them correctly to maintain both customer satisfaction and business profitability.