A product backlog is a prioritized list of features and requirements that a team is working on for a software product. It is a dynamic document that is continually updated throughout the software development lifecycle. The product backlog helps the team to focus on the most critical features and ensure that they are delivered in a timely and efficient manner. The Product Backlog is an essential tool in Agile and Scrum methodologies. Here's an example of a product backlog in JavaScript format:

javascript
 
 
Copy code
let productBacklog = [
   {id: 1, feature: 'User Login', priority: 1},
   {id: 2, feature: 'Add to Cart functionality', priority: 2},
   {id: 3, feature: 'Payment Gateway Integration', priority: 3},
   {id: 4, feature: 'Customizable Profile', priority: 4},
   {id: 5, feature: 'Admin Dashboard', priority: 5}
];