Because most Amazon shoppers browse on mobile and can't physically pick up or inspect a product before buying, images need to (a) stay uncluttered with text sized to remain legible on a phone screen, and (b) include dedicated zoom-in/detail shots of small features, materials, or textures that a shopper would otherwise check by hand in a store.
Apply: check every callout and infographic on an actual phone screen before publishing, and add close-up crops of texture, stitching, hardware, or other fine detail alongside the standard gallery shots — this substitutes for the physical handling shoppers lose by buying online.
Most shoppers browse image sets quickly on a phone screen, so text and graphics that look fine in a desktop preview can become illegible or cluttered at phone size.
Apply: Limit the amount of text and graphic elements per image, and before publishing, view the finished image at actual size on your own phone to confirm font size and layout are still legible at a glance.
Close-up shots of a specific material, hardware component, or texture let shoppers 'see' something they can't physically touch before buying — most useful when paired with a durability or quality claim that a zoomed-in shot can visually back up (e.g., zooming into a hinge or hardware piece to substantiate a 'heavy-duty' claim).
Apply: When a durability/quality claim appears elsewhere in the listing, add a zoom-in shot of the specific component that substantiates it rather than a generic close-up.