Optimize product images to load quickly across global markets and write alt text that helps your products surface in image search and accessibility tools.
Fatima Benali runs a Moroccan argan oil cooperative that exports to beauty distributors in Europe and North America. Her website featured high-resolution photographs of the harvest process, the cold-pressing facility, and the finished product bottles -- but none of the images had alt text, and the file sizes were over 3 MB each. A buyer in France searching Google Images for "organic argan oil supplier" would see competitors' product shots long before Fatima's, and visitors who did land on her site faced five-second load times on mobile. Her images were actively hurting both her search visibility and the user experience.
Images are an overlooked SEO asset for exporters. Google Images drives billions of product discovery searches every day, and properly optimized product photos can appear in both web search and image search results. Beyond visibility, image optimization directly affects page load speed, which is a confirmed ranking factor and a critical user experience metric -- especially for mobile buyers in markets with slower internet infrastructure.
In this lesson, you will learn how to compress and format images for fast global delivery, write alt text that serves both search engines and accessibility standards, and implement image sitemaps to ensure Google indexes all of your product photography.
Large image files are the single biggest contributor to slow page load times. An export site with dozens of high-resolution product photos can easily exceed 5 MB per page, which is catastrophic for mobile users in emerging markets. Use image compression tools like Squoosh, ImageOptim, or TinyPNG to reduce file sizes by 60 to 80 percent without visible quality loss. A well-compressed JPEG at 80 percent quality typically looks indistinguishable from the original but loads in a fraction of the time.
Choose the right image format for each use case. WebP offers superior compression compared to JPEG and PNG while maintaining quality, and it is supported by all modern browsers. Convert your product photos to WebP for a 25 to 35 percent additional size reduction over JPEG. For icons, logos, and simple graphics, use SVG format -- these are resolution-independent and often just a few hundred bytes. For photographs where WebP is not suitable, use progressive JPEGs that render gradually rather than loading from top to bottom.
Implement lazy loading so that images below the fold only load when the user scrolls to them. The native loading="lazy" attribute works in all modern browsers and requires no JavaScript. For export sites, also consider using a CDN with image optimization features -- services like Cloudflare, Cloudinary, or imgix can automatically serve the optimal format and size based on the user's device and network conditions, which is especially valuable when your buyers span multiple continents.
Alt text serves two purposes: it describes the image for visually impaired users who rely on screen readers, and it provides Google with contextual information about the image content. For product images, write alt text that describes exactly what the image shows and includes relevant keywords naturally. Instead of "IMG_4523.jpg" or "product photo," write "Cold-pressed organic argan oil in an amber glass bottle with a traditional Moroccan label." This alt text tells Google the image contains organic argan oil, in a bottle, with a Moroccan label -- all useful ranking signals.
Keep alt text under 125 characters. Screen readers typically cut off alt text at this length, and Google prefers concise descriptions. Avoid keyword stuffing -- "argan oil, organic argan oil, Moroccan argan oil, argan oil for hair, argan oil supplier" is not helpful for anyone. Write for a human first: "Organic argan oil packaging with traditional Moroccan design, 100 ml amber bottle." One or two natural keyword inclusions are sufficient.
For multi-language sites, alt text should be localized, not just translated. An image of a handwoven rug might have English alt text "Handwoven Berber rug in red and black geometric pattern" and the French equivalent "Tapis berbère tissé à la main aux motifs géométriques rouges et noirs." The keywords that buyers search for in each language are different, and localized alt text gives your images the best chance of ranking in each market's Google Image search.
Google discovers most images through the pages they are embedded on, but an image sitemap can help ensure that product photos are indexed, especially if they are loaded via JavaScript or hidden behind tabs and accordions. An image sitemap is an extension of your regular XML sitemap that includes additional image-specific metadata like the image URL, caption, title, and license information.
For export sites, prioritize adding product images to your sitemap. Include the primary product photo and any alternate-angle images. Use the
Submit your image sitemap in Google Search Console and monitor the Image tab for indexing errors. Common issues include broken image URLs, images blocked by robots.txt, and images that are too small (Google generally ignores images under 50 by 50 pixels). Regular monitoring ensures that your product photography remains visible in Google Image search, which can be a significant source of traffic for export businesses with visually distinctive products.
WebP is the best all-around format -- it provides excellent compression with high quality and is supported by every major browser. For photographs where file size is critical, consider AVIF, which offers even better compression than WebP but has slightly less universal support. Use JPEG as a fallback for older browsers and SVG for logos, icons, and illustrations.
Alt text is a ranking factor in Google Image search, not in general web search. However, it contributes to the overall relevance signals on a page. Since Google can now analyze image content using computer vision, alt text is less critical for understanding what an image shows but remains essential for accessibility and still provides useful keyword context that can help Google understand the topic of the surrounding page.
Yes, though less than alt text. Use descriptive, hyphen-separated file names like "organic-argan-oil-100ml-bottle.webp" rather than "IMG_9823.jpg." Google uses the file name as one of several signals to understand image content. It is a small ranking factor, but when you are optimizing dozens or hundreds of product images, small advantages add up across your entire catalog.