Why Website Speed Directly Dictates Revenue
Google has confirmed that page speed and Core Web Vitals are official ranking signals. Furthermore, Amazon found that every 100ms of latency cost them 1% in sales, while Google noted that a 500ms delay dropped traffic by 20%.
Diagnosing the Three Core Web Vitals Metrics:
1Largest Contentful Paint (LCP): Target < 2.5s
Measures how long it takes for the largest visual block (usually hero text or banner image) to render.
*Fix:* Convert all images to modern WebP / AVIF formats, use
fetchpriority="high" on hero images, and eliminate render-blocking CSS.2Interaction to Next Paint (INP): Target < 200ms
Replaced FID in 2024; measures responsiveness when users click buttons, open dropdowns, or toggle mobile menus.
*Fix:* Avoid long-running JavaScript execution on the main thread, debounce input handlers, and split heavy client bundles.
3Cumulative Layout Shift (CLS): Target < 0.1
Measures unexpected visual jumps as images and fonts load.
*Fix:* Always declare explicit
width and height attributes on <img> tags and reserve space for dynamic banners.