Non Deferred Non Critical Javascript: How to Solve It

This means JavaScript files that aren't required for initial page render or above-the-fold interactivity are still loaded as blocking <script> tags rather than with defer, async, or dynamic/lazy loading. It typically happens when all scripts are bundled together or loaded in the head without regard for what's actually needed immediately. Blocking script downloads and execution delay HTML parsing and page rendering, which increases Time to Interactive and hurts Core Web Vitals metrics tied to responsiveness.