Wet your hair by quickly rinsing it or spraying it with some water. Your hair needs to be wet (and should be kept wet when the mask's applied).
Apply the hair mask to your scalp and the root of your hair. Gently massage your scalp with your fingertips for a few minutes.This will increase the blood flow, hence improving the absorption of the nutrients!
Leave the mask on for 15 minutes.
Afterwards, wash your hair with cold/warm water and mild shampoo (if needed!).