The product backlog (backlog for short) is unified document that your team will use to manage three critical types of information:
One Backlog per Team. Your team should have only one backlog document that is shared by all team members.
Living Document. Keep in mind that the backlog is a living document that will change and evolve as the project rolls along.
Your backlog must be formatted as per this template document. To clarify, here is a completed-backlog example.
See the rubrics for each of the backlog’s parts (i.e., user stories, scenarios, and task plans and outcomes).