The other big advantage of Raw format is that it contains a lot of color and light information, it gives more details in light, shadow, and color. Post processing is thus more precise and flexible. A Raw file can easily be worked on, without impacting quality. Which is not the case of a JPEG which contains less information.
Why do I post process my photos? A Raw format is not a final file. Sharpening, colors, contrast, light and shadows need a little bit more work. It is "raw" and flat. It needs action from the photographer, such as a film would need the professional service of a lab for post processing and to get to the final image.
Post processing also allows the photographer to finalize the style and atmosphere of a photo, bring his/her own personal touch, and convey the emotion of a scene.
This is what makes the difference and therefore it is a crucial stage. It can take a bit of time, depending on the photography made, but it is worth the wait.
Once post processed, the image is saved as a JPEG for sharing and reading through other computers.
Author : Rev'elle Photo, Lyon based photographer (France), http://www.revellephoto.fr