How do you work if the business itself does not understand what solution should be?

If the business does not understand what solution is needed, I start with actively gathering requirements and conducting interviews with key stakeholders. It is important to identify real problems and goals, not assumptions. Then I propose prototypes or several options for solutions to get feedback and clarify expectations. Creating user stories or use cases often helps, as they make requirements more concrete. This iterative approach allows gradually arriving at an optimal solution.