Image optimization is the process of reducing image file sizes and improving delivery without sacrificing visual quality. It includes compression, format selection (WebP, AVIF), responsive sizing, lazy loading, and descriptive alt text. Optimized images load faster and consume less bandwidth.
Why Image Optimization matters for SEO
Images are typically the largest files on a web page and the #1 cause of slow LCP scores. Unoptimized images directly hurt Core Web Vitals, page speed, and user experience. Proper image optimization can reduce page weight by 40-80%.
Pro tip on Image Optimization
Convert images to WebP or AVIF format. Compress images (target 80% quality). Set explicit width and height attributes (prevents CLS). Implement lazy loading for below-fold images. Use responsive images with srcset. Add descriptive alt text.
Related terms
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