It helps change the brightness of all the dark parts and prevent overexposure of the bright areas. This is the exact opposite of the highlights option. Highlights allow the user to change the brightness of the brightest parts and helps prevent loss of details in the darkest areas of the images, while all the overexposed areas gain some. If you increase it, the contrast will reduce it and bring out all the details in the dark parts of the image. The ambience option allows you to change the saturation and contrast together.

If you increase it, the colours will pop but if you decrease it, the colours will be dull. The saturation refers to the amount of colour in your images. Some people will choose more contrast and others will choose the normal. The contrast option helps differentiate between the darkest and lightest parts of your images. However, when doing that, you will have to be more careful about the noise. You can use the feature to add more light to the darker shots too.

By decreasing the brightness value, you will bring details to form overexposed parts of your images. The brightness option is more helpful when your images are overexposed.

Snapseed photo edits