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The Role of Image Compression in Core Web Vitals (LCP, FID, CLS)

SEO Focus
Core Web VitalsLCP optimizationCLS improvementFIDwebsite performance metrics
Google’s Core Web Vitals—Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS)—directly impact search rankings and user experience. LCP especially is often dominated by image load time; oversized or unoptimized images delay the rendering of key content. Lossless or high-efficiency lossy compression reduces file size, speeding up content display. Ensuring images are in the right size and format, implementing lazy loading, and leveraging modern formats like WebP and AVIF minimize impact on FID and prevent layout shifts, improving CLS. Comprehensive image optimization is the foundation for passing Core Web Vitals assessments and maintaining top search positions.