Product Owner
The single person accountable for maximizing the value of the product resulting from the work of the Scrum Team.
What it means
The Product Owner manages the Product Backlog, which includes developing and communicating the Product Goal, creating and ordering backlog items, and ensuring the backlog is transparent and understood.
The Product Owner may delegate backlog work to others, but remains accountable for the outcome. Decisions the Product Owner makes are visible in the content and ordering of the Product Backlog; to respect those decisions, the organization must not give conflicting work to the Developers through anyone else.
Common mistakes
Effective Product Owners are deeply connected to customers, data, and stakeholders, translating that understanding into a prioritized backlog rather than simply relaying stakeholder requests one-to-one.
Example
A Product Owner reorders the backlog after churn data shows onboarding drop-off is more costly than the feature originally planned next.