Technical Definition
Image optimization reduces image file sizes while maintaining acceptable quality. Techniques: compression (lossy/lossless), modern formats (WebP, AVIF), responsive images (srcset), lazy loading, proper dimensions. Images often cause poor LCP. Also optimize: file names (descriptive), alt text (accessibility and context), and structured data for image search visibility.
Simple Explanation (ELI13)
Image optimization means making your images load faster without looking bad. This includes compressing files, using modern formats like WebP, and not loading images until they're needed (lazy loading). Big, unoptimized images are often why websites feel slow. Also use descriptive file names and alt text so Google understands what images show.
Related Terms
LCP, Page Speed, Alt Text, WebP, Lazy Loading
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