What should a PO do while the DT works on the sprint?

The PO plays a central role in Scrum. S/he is responsible for the project's outcome, therefore, s/he should be committed to the project. While the DT has to put in a fixed number of hours each day, what kind of working hours should a PO put in? What kind of work should a PO ideally do?

Posted By - C1 Product 1