The reoccurring question for all Product Owners is: What should be built? It occurs in sprint planning: What should be built this sprint? It occurs in thinking about the near future: What should be built next? And it occurs when thinking further out: What should be built next year? What do our future customers need?
Product ownership revolves around this question. The question is asked again and again because the world is changing—what customers bought yesterday might not be what they buy tomorrow—and because new information becomes available. Consequently, the Product Owner role, and the way they work is different from roles that came before.
Source: The Art of Agile Product Ownership, Allan Kelly, Apress