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

https://www.livebinders.com/b/3692792?tabid=f17289ba-74f8-e996-0f67-526815915bb5

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