A product backlog is an ordered list of tasks, features, or items to be completed as part of a larger product roadmap. With an effective product backlog, you can assign developers daily, weekly, or monthly tasks that target your end goals and help you build a better product. Learn how to create a product backlog, plus tips on how to prioritize the items in your backlog. A product backlog is an ordered list of tasks, features, or PBIs (product backlog items) to be completed as part of a larger roadmap.