Hues are gradations of a specific color. You can play with hues to achieve special effects, but you normally do not want to change the hues in your photos.
Saturation is a measurement of the purity of a color. Many photographers increase saturation to make dull photos more vibrant. Unfortunately, increasing saturation can distort the colors in the photo. Increasing saturation can also remove fine details and shading in photos. If you do increase saturation, make sure the colors in the photo look natural and that you do not eliminate details.
To Adjust Hue, Saturation, and Lightness: