In traditional project management, the Project Manager (PM) is responsible for the timeline, budget, resources, and risks. They may oversee multiple projects at once, regardless of what the product is.
The Product Owner, by contrast, is focused not on the project itself, but on the product — specifically, what needs to be built and why. In Scrum, there’s no Project Manager role at all, as those responsibilities are shared among the Product Owner,
Scrum Master, and the development team.