A traditionally based yoga class begins and ends with chanting. Written in Sanskrit (considered the oldest literacy language of India) the verses are often repeated several times.
Each verse known as a shloka is either a single sound (vowel) or a phrase. As it is chanted it creates a vibration, which is understood to resonate beyond the physical realm of the body.
While each chant has its own unique and special meaning, they are also universal in their reverence to the divine. They are calming, peaceful and open your heart as well as mind.
This is the way I learned to practice and I hope you use them in your daily practice too.