This depends largely on the type of facial that you have. The titles and descriptions of facials give you a vague idea of their general intention. The aims of most facials are the same:
to clean and smooth: sloughing away dead skin cells with an exfoliator, and deep-cleaning pores with a cleanser, helps prevent acne and dull skin, and leaves skin feeling smoother and softer
to balance and moisturise: hydrating skin with the right facial oil, serum and/or moisturiser for your skin type will nourish your skin and balance over-dry and over-oily patches
to target specific skin concerns: such as blemishes and breakouts - healing and brightening products and toning techniques can be used to make your skin look clearer, firmer, fresher and lovelier!