How does meditation actually clean my aura?

Name: Aarushi Mehta

Date of Birth: 15 March 1992

Time of Birth: 2:45 PM

Place of Birth: Delhi, India

Many people say meditation naturally purifies your energy field, but how does it work for me personally? In terms of aura cleansing, does meditation help by calming my mind, balancing my chakras, or raising my vibration? Why is it effective for cleansing my aura?