Every part of the GPU series ends with a "before you call it done" checklist. This page puts all of them in one place. Tick what your platform already does. The score shows where you are, and the three fixes at the top come from your weakest areas, each linked to the post and live demo that explain it. Your ticks are saved in this browser only.
Based on the checklists in the ten-part GPU series on drpranayjha.com. It is a starting point, not an audit.