You hired a photographer. The shots look clean, the lighting is right, and the gallery gives your customers a clear view of what they’re buying.
Then the images were uploaded as DSC_0047.jpg, with no alt text, at full desktop resolution.
And somewhere on Google Images, a competitor whose photography isn’t half as good is ranking for the exact queries your customers are typing — because they did the part that doesn’t show on screen.
Google Sees Your Images Differently Than Your Customers Do
When a shopper lands on your product page, they see your image. When Google crawls it, it sees a filename, an alt attribute, surrounding text, a file size, and a load time. That’s the complete picture, as far as search is concerned.
Every one of those signals is an opportunity — and most ecommerce brands are leaving the majority of them unused.
Google Images drives a meaningful share of ecommerce discovery. For visual categories — home goods, apparel, accessories, beauty, outdoor gear — a well-optimized image gallery can surface in shopping results, image search, and Google Lens lookups that your standard SEO strategy would never capture.
That’s traffic competitors are quietly picking up while your images sit unindexed.
The Four Places Your Images Are Losing Ground
File names. Search engines read file names as signals about what an image contains. IMG_3847.jpg tells Google nothing. navy-linen-throw-pillow-18x18.jpg tells it exactly what it’s looking at — and gives you a chance to appear when someone searches for that.
This is the single easiest fix in image SEO, and it almost never gets done because images are usually uploaded straight from a camera or export folder.
Alt text. Alt text was originally designed for accessibility — it describes an image to users who can’t see it. Search engines also use it as a primary signal for image indexing. Blank alt attributes are a missed indexing opportunity on every image. Generic alt text (product image 1) is nearly as bad.
Good alt text is specific and descriptive: the product name, a key attribute or two, the brand. One sentence. Written for a person, not a crawler — which happens to be exactly what search engines reward.
File size and load speed. This connects back to both rankings and engagement. Google’s Core Web Vitals — a direct ranking factor since 2021 — measure how fast your page loads and how stable it is as images render. An uncompressed hero image can single-handedly push a page into poor Core Web Vitals territory.
Smaller file sizes, modern formats (WebP offers 25–35% smaller files than JPEG at equivalent quality), and properly sized images for mobile aren’t just speed optimizations — they’re SEO signals.
Structured data. For product pages specifically, adding image information to your structured data markup (Schema.org Product type) helps search engines associate your images with your product listings in rich results. This is the layer most brands never reach — but it’s what separates listings that appear with visual previews in search from those that don’t.
Why This Keeps Getting Skipped
The honest reason is that image SEO sits in an awkward gap between teams.
Photographers deliver files. Marketers upload them. Developers built the product pages. Nobody owns the metadata layer in between — the alt text, the file names, the compression settings, the structured data.
In practice, that layer gets skipped because it’s time-consuming, tedious, and its impact isn’t immediately visible. The page looks the same with or without alt text. The image loads on most connections either way. The rankings shift gradually, not overnight.
But gradually is still directional. Every month that passes with unoptimized image metadata is a month a competitor has the chance to own the visual search real estate your catalog should be occupying.
A Starting Point
You don’t need to fix everything at once. A useful place to start is your top ten SKUs — the products driving the most revenue or the most traffic. Check their image file names, audit the alt text, and run the images through a compression check.
For most catalogs, those ten products will have the same gaps as the rest. But fixing them first gives you a proof of concept and a template for the rest of the catalog.
The technical layer isn’t glamorous. But it’s where discoverability actually lives — and it compounds every time someone finds you on Google before they find your competitor.
Want to see the specific gaps in your gallery? We’ll pull the audit on your top product pages and come back with what’s being missed.
Talk soon,
Lily at Melon Tree