Photoshop Tools that you can Use
Brightness and Contrast
Adjusting the brightness makes the image more visible due to higher lighting condition. You can either light up an image or darken it. Contrast however adjusts the tonal range of an image where the dark gets darker and white gets whiter. To better understand: Here is a Tutorial about Applying Brightness and Contrast
In a Curves Adjustment tool, it is a way of adjusting the Shadows, Midtones and Highlights using a control point line. Moving the points allows you to have more control over specific tonal range. Know more about Curves: Use Adjustment Curves
It is a tool that helps you adjust Highlights, Midtones and Shadows to control the amount of input that you would like for your image. Adjusting the level tool is easy, you can move them left to right. Read More: Get to know more about levels
Vibrance and Saturation
A Color Correction tool that let’s you adjust the boldness of the color, you can either increase or decrease the weight of the color of the photo.
Hue and Saturation
To change your color of your photo, use hue and saturation to change it to blue, red, yellow, green, red, violet. Hue is the settings for you to change your colors. Saturation is the density of your color, if you increase the color the image is more bold. Lightness is the gamma or lightness of the color, either you make the brightness heavier or lighter.