TL;DR: Image SEO ב-2026 = WebP format (mandatory) + lazy loading + descriptive alt text + responsive images. AVIF יותר חדש, 30% smaller מ-WebP, 95% browser support.
Formats
WebP
30% smaller מ-JPG באותה איכות. Support: all browsers since 2020. Default format ב-2026.
AVIF
30% smaller מ-WebP. Newer, 95% browser support (נופל לפעמים ב-Safari ישן).
JPEG/PNG
Still OK ל-fallback. PNG ל-transparency (logos). JPEG ל-photos.
SVG
Vector. מושלם ל-logos, icons, illustrations simple. Tiny file size.
Compression
Quality 75-85 is sweet spot. Tools:
- TinyPNG/TinyJPG.
- ImageOptim (Mac).
- Squoosh (Google, free).
- ShortPixel (WordPress).
Alt text. חשוב במיוחד
- Descriptive, not stuffed.
- 50-125 characters.
- Include keyword if natural.
- Describe image, not just label it.
Bad: "shoe". Good: "blue running shoes on wooden floor".
Lazy loading
<img src="image.webp" loading="lazy" alt="...">Native browser support. Image doesn't load until scrolled into view.
Responsive images
<img srcset="image-320.webp 320w, image-640.webp 640w, image-1280.webp 1280w"
sizes="(max-width: 600px) 320px, (max-width: 1000px) 640px, 1280px"
src="image-640.webp" alt="...">Schema
ImageObject schema for main images. Contains width, height, caption, author.
File names
Meaningful: "blue-running-shoes.webp", not "IMG_12345.jpg".
Image Sitemap
Optional but helpful. Submits all images ל-Google. For sites with many images.
Google Images traffic
Image search = real traffic source. Well-optimized images can drive 10-20% of organic traffic for visual niches (fashion, design, recipes).