Verify asset versions, file agreements, attach briefs. Every one is ready to run, and you can adjust it in plain language.
Return corrected campaign proofs to their assigned reviewer.
Your reviewer gets the corrected proof and completed fixes when the last correction is done, so the next decision does not sit in rework.
Put revised campaign creative back before its reviewer.
Your reviewer gets a task ready to review, with the replacement proof and its version named in a comment.