There are two key information flows in Scrum related to the Product Owner: (1) Adaptively deciding the direction to evolve the product and reflecting that decision in Product Backlog prioritization, and (2) Discovering and clarifying the details of user needs and items. In the first flow (direction and prioritization), information is sought and analyzed related to profit drivers, strategic customers, business risks, etc. In the second flow (details and clarification), the objective is to discover the fine-grained behavior and qualities of items, the user experience, etc.  

-- Guide: Prioritization over Clarification; Large-Scale Scrum: More with LeSS; p 178  

As Product Owner, you focus on thinking hard about direction and prioritization, but delegate to the teams as much of the detailed discovery as possible. You encourage and help teams enter in a direct conversation with users, acting as a connector, not an intermediary. In short, you are mostly focusing on prioritization rather than detailed clarification, which is delegated to the teams.