The PRD is finalised when it has incorporated review feedback, resolved the open questions that were within scope, and received sign-off from the decision-makers identified in Step Two. Finalised does not mean frozen. It means the document reflects current best understanding and is ready to guide development.
What this step requires you to do:
The PRD is not done when it is shared. It is done when development is done, the metrics have been measured, and the learning has been captured for the next initiative.