A critical resource (CSS or JavaScript file) that's needed for initial page rendering is too large. Large critical resources delay the time it takes for users to see content, negatively impacting Core Web Vitals and user experience.
A critical CSS or JavaScript file is over 100KB, causing delays in page rendering.
Split large critical resources into smaller chunks, inline only the most critical parts, and defer non-critical portions.
<style>/* Only critical above-the-fold CSS */</style>
<link rel="preload" href="remaining.css" as="style" onload="this.onload=null;this.rel='stylesheet'">Smaller critical resources load faster, allowing the browser to render content sooner and improving First Contentful Paint and Largest Contentful Paint metrics.
This issue can affect your site's search engine rankings and user experience. Addressing it promptly helps ensure optimal performance and visibility in search results.
Black SEO Analyzer automatically checks for this warning during site analysis, along with hundreds of other technical SEO issues.
Choose the license that fits your needs and start getting the deep, actionable insights you deserve.