Use formats like JPEG for photographs and PNG for images with transparency. Consider WebP for better compression without losing quality.
Compress images before uploading to reduce load times. Use tools like TinyPNG or ImageOptim for better performance.
Implement srcset to serve different sizes based on the user's screen size, ensuring images look sharp on all devices.
Use lazy loading to delay image loading until they are in view, improving initial load time and user experience.
Regularly test loading speed with tools like Google PageSpeed Insights and make adjustments as necessary.