Why many 50-500 SKU Amazon and eBay sellers who shoot their own product photos struggle with JPGs

https://wakelet.com/wake/LaQsLrUeUoEF7UIi-0bib

Are you managing 50 to 500 listings and doing your own photography? Why do so many small sellers hit a wall when it comes to producing usable JPEG images that actually help sales? The short answer: file format rules and marketplace requirements are