Product Backlogs are ordered list of tasks for a product. This is from my soon to be released Agile Basics course on Udemy.com.

1. Product Backlog
Tom Henricksen
IT Career Coach, Author, Speaker

2. Product Backlog
● Ordered List
○ Additions
○ Items to remove
○ Bug fixes

3. Product Backlog
The product backlog is an ordered list of everything that
might be needed in the product and is the single source of
requirements for any changes to be made to the product.
From Scwaber and Sutherland, Oct 2012. p12, Scrum Guide

4. Product Backlog
● Epics
● User Stories
● Information Radiator

5. Product Backlog
● Master list
● Flexible
● Product Owner

6. Product Backlog
● Detail increases
● Grooming