Depends on the scene but generally shooting RAW will give you more lattitude to extract information - its not just simply like a little bit of +/- EV, but its about being able to get far more information out of the darker parts of the scene. This is the massive difference that raw shooting can give you.
JPG is compressed - it throws away information considered "unimportant" and focuses on the main part of the picture - but RAW is exactly whatever the sensor received equally, so you get to decide at a later stage what is important and what isn't. The downside is that by default it can look very flat and dull, so you do need to learn to spend time developing and enhancing your pictures in post - colours, sharpness, contrast, etc - so if you just want to press the button and that's the end of it, shoot jpg.