With RAW shooting you get all the information to work with straight from the camera as taken. In order to edit it successfully a good RAW editor is necessary.
When shooting in jpeg the camera does the conversion, thus you lose a lot of the original information from the photo. Some editing is usually still necessary, taking a perfect shot depends on the user's knowledge of how to use their camera, and light conditions.
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I have found a photo taken in RAW (done accidentally!) once converted to jpeg on my computer, then edited, can give slightly better results than in camera conversion. That may depend on your computer and/or your programme used to convert to jpeg. I can convert to jpeg using my camera's basic editing programme but it has to be done one at a time and is a slow process. With a DSLR camera of over 16 MP the files are large.
