Seems like you shoot JPEG and this is "Picture Control" your camera apply to photo. Those values represent how much particular setting is applied, based on the "style" you select. Here is Nikon USA web site with more explanations:

Vivid

For distinct, colorful, fresh-looking images with just the right emphasis on your subject’s contrast and sharpening. Compared with Standard, Vivid bestows a more glamorous overall impression. It’s ideal for situations where you wish to emphasize primary colors, such as colorful fashions, city streets, fresh fruits and floral arrangements. With Vivid, you can adjust sharpening, contrast, brightness, saturation, and hue (coloration) individually. Quick Adjust enables easy, balanced adjustments.

You can adjust them on this way (same web page):

Quick Adjust

Quick Adjust makes it easy to achieve well-balanced adjustments. With sharpening, contrast, and saturation, five levels of modification (-2 to +5) are applied automatically. Increasing a value on the plus side strengthens the characteristics of each Picture Control while movement on the minus side lessens the effect. Moreover, after using Quick Adjust, you can carry out finer, more detailed modifications to each item to suit your particular preferences and get the exact results you require. Each Picture Control (except Flat, Neutral and Monochrome) allows you to use Quick Adjust for adjustments.