Which aspect is NOT a responsibility of the Product Owner?

The role of the Product Owner in a Scrum or Agile framework centers around maximizing the value of the product by managing the product backlog, ensuring that features align with customer needs, and facilitating communication between stakeholders and the development team.

Defining requirements is a core responsibility, as the Product Owner needs to clarify what needs to be built in order to deliver valuable outcomes. Similarly, representing the customer voice is crucial; the Product Owner serves as the liaison for stakeholders to ensure their needs and feedback are reflected in the product direction. Signing off on user stories is also part of the Product Owner's duties, as they are responsible for approving features before development proceeds.

Conducting technical training, however, typically falls outside the scope of the Product Owner's role. This responsibility is more aligned with technical leads or other roles within the team dedicated to training and knowledge transfer. The Product Owner's primary focus is on the product vision and customer needs, rather than on the technical implementation itself. Thus, while they play a vital part in product development, conducting technical training is not a typical responsibility associated with the Product Owner role.