Chrome's field data shows that, for at least a quarter of real visits over the last 28 days, the largest element on this page took more than 4 seconds to render. This is a measurement, not an estimate: it is the figure Google uses in its Core Web Vitals assessment, and the page fails it. Slow LCP is almost always one of four things: a slow server response, a render-blocking resource, a late-discovered hero image, or client-side rendering.
The hero image is only discovered after CSS and JavaScript have loaded, and it is lazy-loaded besides, so the browser starts fetching it late and at low priority:
<img src="/hero.jpg" loading="lazy" alt="...">Make the LCP element discoverable in the HTML and fetch it first. Never lazy-load it, give it high fetch priority, and preload it if it is a CSS background. Then check server response time (TTFB) and remove render-blocking scripts in the head:
<link rel="preload" as="image" href="/hero.avif" fetchpriority="high">
<img src="/hero.avif" fetchpriority="high" width="1200" height="600" alt="...">
<script src="/app.js" defer></script>LCP is the time from navigation to the moment the largest element paints. Every step before that paint — the server responding, the browser finding the resource, downloading it, and being allowed to render — adds directly to it. Removing a step or starting it earlier moves the number for real users, which is what the field data will show within 28 days.
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.
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