What is a Backlog?

A backlog is an ordered list of work for a development team that is derived from the roadmap and its requirements.

It serves as a list of a project's work items, helps plan iterations, and facilitates collective prioritization.

Backlog items should be prioritized based on criteria such as customer value or the difficulty of implementation.

The most important items are detailed more, while less priority ones have fewer details and are typically at the bottom of the Backlog.

It is a living list that should change as development progresses on its items.

In Scrum, there are two types of artifacts that employ the concept of Backlog: Product Backlog and Sprint Backlog.