An infographic answers questions a buyer would otherwise have to look for in the description: the fabric composition, the dimensions of a bag, what is in the box, how a closure works. Typical forms are a photo with arrows to labelled details, a cut-out with measurements drawn on, or a short list of features beside the product. It works because shoppers scroll through images before they read text.
Marketplaces treat added graphics in different ways. Many keep them off the main image; some allow them only in later gallery positions, some allow dimensions but no feature claims, and some allow no added text or graphics on any product image. Claims inside a graphic, such as waterproof or organic, are read like listing text and must be true and supported.
Text that reads well on a desktop screen often disappears on a phone, where a gallery image is a few centimetres wide. A workable infographic keeps a few large words, strong contrast and one message per image, and leaves the product as the largest element. Words baked into an image are not translated with the listing, so a shop that sells in several languages needs one version per language.