Most photo touchups consist of overall color correction and object removal or enhancement to the subject. Here are some examples.

Acne removal. Natural airbrushing.
Placed in a Palace. Tailored suit at waist.
Various skin blemishes removed. Wall extended. Color correction.
Bridge removal. Color correction. Basic brochure cover.
Doors painted. Wood floors cleaned. Carpet cleaned. Jeans repaired. Color correction. Added logo.