Before we start, lets learn who is Maa durga?
Maa Durga or Adi Parashakti or Maha Kali or Bhavani are the different names given to the same Divine Shakti. She is the consort of Shiv. Maa Durga represents Power or Shakti or Energy of the Universe. She is Prakriti or Mother Nature. She is depicted as female because in the natural world the female gives birth to her children and plays the role of a Mother. Maa Durga is Jagdamba or Mother of the whole universe. Shiv is the cosmos while Shakti is His Energy. She is the other half of Shiv, Ardhnareshwar. Maa Durga is depicted to have 8 or 10 arms, each hand carrying a weapon or sacred item. Her vaahan or vehicle is a Tiger or Lion. Tiger represents unlimited power while Lion represents beastly desires. Her riding on a lion depicts She has conquered all beastly desires. She is the force/ energy behind Kundalini, the dormant energy coiled like a serpent at the base of the spine of every human.
Maa Durga has 9 forms or avatars, known as NavDurga. She also has 10 other divine forms of Vidya or knowledge, known as Dus Mahavidyas. She in her Katyayani form (the 6th form in NavDurga) slayed the notorious and mighty buffalo demon Mahishasura. This earned her the famous epithet Mahishasura Mardini, meaning slayer of Mahishasura.
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Maa Kali is supposed to represent the Raw power of Nature. She is linked with Dark Matter and Dark Energy, the energy that is currently one of the reasons of the continuous expansion of the Universe. Maa Maha Kali is one of the Ten Mahavidyas. She is beyond time and the consort of Mahakaal (one of the most powerful manifestations of Lord Shiv). Maa Kali emerges when Maa Durga turns wrathful. However beneath all the horror and rage is a Mother, is Mother Durga.
Maa Durga is often connected to Fire and also called Jwala or Jyotawali Maa (Mother of Divine Flame or Fire). As mentioned before, She is Mother Nature Herself.
The Shaktipeeths are divine spots dedicated to Maa Durga. Sati immolated Herself when her father Daksha did not accept Her love for her husband Mahadev (Shiv). Shiv turned wrathful and lost all control. He carried Sati’s burned body around in the heavens. Nobody was able to console Him. Then Lord Vishnu with His Sudarshan Chakra tore Sati’s body into 51 different parts in order to calm Lord Shiv’s sorrow down. The 51 body parts fell at different places in Bharat. Those sites came to be known as Shaktipeeths.
One of the most famous powerful manifestations of Maa Durga is Maa Vaishno Devi.