Amazon is working actively for Sellers to make everything easy and valuable. Recently, Amazon has launched a bulk image tool where sellers can upload multiple images together to the Amazon Product Listings. Previously, you could only upload images and view the upload status for one product at a time. You can now upload up to 5 GB worth of product images at once with the bulk image upload tool and view the status of all your uploads in the image upload status report in Seller Central.
Every detail page in the Amazon store requires at least one product image, and we recommend you provide six images and one video. Good images make it easy for customers to evaluate the product. Images should be clear, informative, and attractive. The first image on the product detail page is the “MAIN” image and is shown to customers in search. The MAIN image must show only the product for sale on a white background, and the product should fill the image frame. Additional images should show the product in use or in an environment, different angles, and different features. Please note that video upload is a separate workflow. Search help pages to determine if it is enabled in your location.
Ref: https://sellercentral.amazon.com/imaging/upload?ref=nslp_at_GSAA4WZPVT48GCPU_nslnk_cta
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