What are the best practices for optimizing images for an Instagram-like Blogger template?

Image optimization is crucial for performance. Use compressed image formats like WebP (if supported by browsers) or JPEG. Resize images to appropriate dimensions before uploading; avoid serving large images that are scaled down by the browser. Implement lazy loading to load images only when they are visible in the viewport. Use descriptive alt text for accessibility and SEO. Consider using a Content Delivery Network (CDN) to serve images from servers closer to your users.