Shooting in RAW means that you will always have a full-resolution “negative” of your original image.
Such is not the case when you shoot in JPEG, where you lose a bit of information from the photo each time you make a correction/edit.
Shooting in RAW also gives you so much more flexibility when it comes to adjusting your photos; probably my favorite feature is the ability to adjust exposure after you’ve shot the photo.
In other words, if you don’t get the exposure (lighting) quite right when you take the shot, you can darken or lighten it after the fact.
There are limitations to this, of course: you can’t shoot a photo in the dark, then turn it into a perfectly exposed shot afterward. But within a few f-stops, you can wriggle yourself out of a lot of jams.
Hope this helps, if not let me know or check out this site that I found..Lots of interesting stuff..