If you do not have any in-camera 'picture styles' applied, (
Canon, but called different names in other brands of camera), the jpg will come out looking very similar to the
raw file. The Picture Style is where the camera applies
sharpening, saturation, brightening, noise reduction etc. effects, to the
raw file when producing a jpg for you. Most people seem to have some in camera effects turned on, so yes, then the jpg comes out of the camera with some processing done. Then, if you want your
raw file to match the jpg the camera produces at the same time, I guess you would have some PP to do.
For years, I had no camera applied effects turned on, so my camera (50D) produced jpgs looking very similar to my
raw files.
Many
raw files already have a full size jpg embedded in them. I never figured out why anyone wanted to shoot
raw + jpg, when it is extremely easy to extract the jpg already in the
raw file. I just use
IJFR (Instant JPG From
Raw) if I need jpgs. IJFR puts an item in your Right Click Menu so you can click on a folder containing all your
raw files and it extracts the jpgs to a folder very quickly. It can do 100's in a few minutes.
These days I do have Picture Styles turned on in my camera. I discovered the power of them for cutting PP time down. In
canon you can create your own personal picture styles (probably in other cameras as well.) I made one which suited my processing needs. Now the jpgs in my
raw files have my picture style applied to them, so if I were to extract the jpgs, they wouldn't look at all like my
raw files, but come out partly processed for me.
I don't use jpgs normally, but have found a way to open my
raw files in photoshop with my camera picture styles applied. Cuts down basic processing time dramatically.
Probably just confused you all the more