In Agile methodologies, the Product Owner is responsible for defining and prioritizing the product requirements to ensure they align with customer needs. Defining success criteria involves establishing clear, measurable goals that determine whether the project's technical features meet customer expectations.
According to the CompTIA Project+ PK0-005 exam objectives, under Domain 1.1: Explain the basic characteristics of a project and various methodologies and frameworks used in IT projects, understanding roles and responsibilities, including that of the Product Owner, is essential.