An OKR is marked as a Draft OKR when your decision to include the OKR in the selected period is pending review from managers, upper management and users. Once reviewed, amendments made, OKRs finalized and you can edit and remove the Draft OKR option & start achieving your approved OKR.
However even when the OKR is a Draft OKR, you can still add key results and check-in its progress. When your management agrees to implement this OKR, you can remove its Draft status.