The Product Owner is accountable for the effective management of the Product Backlog. This includes ensuring that items are properly refined and ready for the Scrum Team to work on. The Product Owner’s role involves facilitating the understanding of the Product Backlog items and making decisions about the order and priority of these items.
While the Product Owner holds the primary responsibility, the entire Scrum Team collaborates on the Refinement process. This collaboration ensures that all team members have a clear understanding of what needs to be done, thus enhancing the effectiveness of the Sprint Planning event.