1. Compress Images: Start by compressing your images using compression tools or online services to reduce their file size without harming quality. Tools such as JPEG Optimizer, TinyPNG, or Squoosh can help you compress your images.

2. Next-gen Format Conversion: Convert your images to next-gen formats that offer improved compression and quality, such as WebP, JPEG 2000, or AVIF. You can use existing conversion tools or libraries such as WebP Converter, Cloudinary, or Imagemagick to change the format of your images.

3. Browser Compatibility: Ensure that the next-gen image formats have compatibility with key browsers. Even though most browsers support WebP, other formats may have less coverage in specific browsers. Use fallback options or polyfills to ensure that your images are displayed correctly across various browsers.

4. Implement Responsive Images: Use the HTML `srcset` and `sizes` tags to provide different image sources and sizes based on device screen size. This helps you provide appropriate-sized pictures to different devices, resulting in improved performance and reduced downloads.

5. Lazy Loading: You can delay the loading of images until they are genuinely needed by using lazy loading for images. By only loading images when they are about to enter the user's viewport, this technique can significantly improve initial loading times.

6. Use of CDN: Use a Content Delivery Network (CDN) to store and deliver your images from edge servers located nearer to your website users. This technique helps decrease latency and enhance image loading speed worldwide.