As Marty mentioned, just viewing on a computer you will not see a big difference.
But each time you want to modify a JPEG image, you lost information more and more.
Basically the camera shoots in RAW, but if you have selected JPEG files, the onboard camera computer is looking at the settings you have and processes the RAW data and writes a JPEG to the card. The alternative is to have the camera write the RAW file to the card, and you do the RAW processing on your computer.
You may agree, it is the smarter way.
I would start to shot in RAW+ JPEG.
This way you have always the original and a JPEG image.
Gerold - Nikonian in East Frisia Eala Freya Fresena