This document provides instructions for improving a change that did not pass code review by submitting another patch set. It outlines preparing to improve either your own change or someone else's change. The steps include checking out the relevant branch, fetching the latest patch set, making improvements based on reviewer comments, committing the changes with the existing Change-Id, and pushing the new patch set to Gerrit for additional review. Repeating this process allows iterative improvements until the change is approved.