The Devi Kavach is a must do mantra for those pursuing the Shakti form of Yoga and meditation to invoke the power of the goddess within you. This is chanted prior to the Chandi. Its purpose is to free you from tendencies that hamper tranquility, and offers psychic protection.
The Kavach frees you from dark tendencies and experience of debilitating low periods.

Don't recite it for material rewards, recite for its protection and strength. The courage and freedom from fear is the reward one reaps

English Translation Ramesh Krishnakumar, Singers: Bombay Sisters