Over the coming weeks, Scrum.org will be releasing explanations of the various updates that have been made to the Scrum Guide. The first of these explanations relates to the term used for product backlog organization.
In the past, the Scrum Guide consistently used the word "priority" for the Product Backlog or noted that the Product Backlog was “prioritized.” While the Product Backlog must be ordered, ordering by prioritiy is only one of many techniques — and can lead to sub-optimal ordering if used exclusively. The new Scrum Guide has migrated to using the term ordered for the Product Backlog. This reflects a long-held understanding by many leaders in the Scrum community. The reasons for the change are clarified here