What are RAW images? I’m glad you asked and Apple may have an answer for you. The App Store editorial team did a great job of explaining in simple terms what RAW images are. The article explains why they offer more information than JPEGs. Head to this link for all the details. It is a short read.
Next, if you are an iPad user looking forward to iPadOS 13, you’ll see that you need a third party application to edit RAW images by reading my blog post on the subject. Why? Because Photos.app doesn’t support RAW images editing. Meanwhile, I’m so anxious to get my hands on Lightroom for iPad this fall with full support of iPadOS 13.