Reduce file sizeThe next step in image SEO is to ensure your scaled image is compressed. Combine this practice with other image SEO techniques, such as proper image formats, compression, and lazy loading, for maximum impact on your website’s speed and Core Web Vitals. Enroll in our free Structured data training course to learn more about adding structured data to your pages! Adding images to your XML sitemaps helps Google index your images, so be sure to do so for better image SEO. Image SEO: summaryImage SEO is the sum of a number of elements.