Reducing image file sizes is crucial for web performance. Here are proven techniques:

1. Choose the right compression level:
- JPEG: 80-90% quality for photos
- PNG: Use PNG-8 for simple graphics
- WebP: 80-85% quality for photos

Proper compression settings balance quality and file size

2. Resize images appropriately:
- Don't serve 2000px images for 300px displays
- Use responsive images with srcset
- Consider your audience's screen sizes

3. Remove unnecessary metadata:
- Strip EXIF data from photos
- Remove color profiles if not needed
- Clean up unnecessary metadata

Remove unnecessary data to reduce file size

4. Use progressive JPEG:
- Better perceived loading performance
- Images load in stages
- Improved user experience

5. Implement lazy loading:
- Load images only when needed
- Reduces initial page load time
- Improves Core Web Vitals

6. Use CDN and caching:
- Serve images from CDN
- Implement proper caching headers
- Reduce server load

7. Consider modern formats:
- WebP for modern browsers
- AVIF for cutting-edge support
- Provide fallbacks for older browsers

By implementing these strategies, you can significantly reduce file sizes while maintaining visual quality.