Many people are familiar with the User Story format for writing Product Backlog items.
The term User Story comes from the agile framework Extreme Programming (XP). The User Story format is only one format for writing and managing items in a Product Backlog.
What goes into writing a backlog item?
Great Stories are 'valuable'.
The best way to write acceptance criteria
Putting the user at the front of development
Base PBIs on this simple conversational pattern