Core Web Vitals Example Report — LCP, CLS & INP Analysis | AIPageSEO
This example shows a Core Web Vitals audit for an e-commerce product page. LCP is 3.8 seconds — above the 2.5s threshold — caused by a hero image without preloading. INP is 280ms — the main thread is being blocked by third-party scripts. CLS is excellent at 0.04.
Hero image not preloaded — <link rel="preload"> missing
The LCP element is the hero product image (800×600, 78KB). It is not preloaded, so the browser only discovers it after parsing the full HTML. Adding <link rel="preload" as="image"> in <head> will reduce LCP by approximately 0.8–1.2 seconds.
Hero image not served in WebP format (78KB JPG)
Serving the hero image in WebP instead of JPEG would reduce it from 78KB to approximately 45KB — a 42% size reduction. Combined with preloading this would bring LCP well under 2.5s.
Render-blocking CSS from third-party review widget
A third-party CSS file from reviews.example-widget.com is blocking rendering for 380ms. Load it asynchronously or inline critical CSS to unblock rendering.
Third-party analytics script blocking for 180ms
The chat widget script (chat.support-widget.com) runs a 180ms long task on page load, blocking user interaction. Load it with the defer attribute and only after the user first interacts with the page.
Add-to-cart click handler running 140ms synchronously
The add-to-cart button event handler runs 140ms of synchronous JavaScript before responding to the click. Break the work into smaller chunks using setTimeout or requestIdleCallback.
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