Ma Kali's energy is like a simulated death experience. She helps us withdraw our attention from the outer mind, emotions and senses into the inner heart. In this regard, Kali is the prime Goddess of Jnana or Self-knowledge. She takes us back to the Self in the heart, unifying all our experience within it.

In Hinduism, Kali (/ˈkɑːliː/; Sanskrit: काली, IAST: Kālī) or Kalika is a form of Mahakali, the goddess of ultimate power, time, destruction and change in Shaktism. In this tradition, she is considered as a ferocious form of goddess Adi Shakti, the supreme of all powers, or the ultimate reality.

Here are some reasons why you would invoke her:
Dissolving limiting beliefs.
Self empowerment.
Facing fears.
Releasing egoic constructs/beliefs.
Changing perspective on life and death.
Liberating yourself from old attachments.
Invite the wild, divine feminine into your life.