Yoga instructors initiate "namaste" at the end of a yoga class as a symbol of gratitude and respect towards their students, and invite them to do the same to their fellow classmates.
Place your hands together at the heart chakra. This increases the flow of Divine Love.
Bow forward and surrender your head to your heart. This provides humility and reiterates the namaste message.
Fun fact: In India, namaste is used as a greeting. It is also used to seek forgiveness when accepting any wrongdoing.