The product backlog is a prioritized list of everything that may be included in the product. It can include epics, stories, features, bugs (if the product is in production, or if there have been releases of the product in prior sprints), documentation changes, and any other tasks required by the product owner or agile team. The product owner owns the backlog and the priority of the items on it. The product owner may seek input from stakeholders, business representatives, and the agile team to help set the priority, but the owner is responsible. The backlog is maintained during the sprints through the backlog grooming ceremony.