The responsibility for managing the product backlog typically falls to the Product Owner. This individual is tasked with prioritizing the backlog items, ensuring that the team is focused on delivering the most valuable features first. The Product Owner collaborates with stakeholders to gather requirements and feedback, which helps in refining and updating the backlog regularly. In summary, the Product Owner plays a crucial role in overseeing the product backlog, prioritizing tasks, and aligning them with stakeholder needs. This involves continuous communication and adjustment to ensure that the development team is always working on the most impactful items.