I have a Nikon Coolpix S6400. It's a fine camera for what I bought it for - point and click pictures of family, pets, landscapes and flowers. Of course now I want to get really cool pictures and maybe its lacking a couple of features I'd hope for, but really I have no complaints.
I looked up ISO and got this website: Understanding ISO - A Beginner's Guide
and they said, "In very basic terms, ISO is the level of sensitivity of your camera to available light. The lower the ISO number, the less sensitive it is to the light, while a higher ISO number increases the sensitivity of your camera." It went on to explain that a higher ISO lets you take pictures with less light, but gives you a lower quality picture. Not sure that messing with the ISO will help my pictures any. :\
I can play with exposure (over and under) and with white balance. I didn't see anything else that seemed too useful.