Navaratri is a Hindu festival that spans nine nights and is dedicated to the worship of the divine feminine power, known as Devi or Shakti pooja.

The festival celebrates the victory of good over evil and is observed with great enthusiasm and devotion in various parts of India. During Navaratri, different forms of the goddess are worshipped on each of the nine nights. This tradition is known as the Navadurga Pooja, where "Nav" means nine and "Durga" refers to the goddess Durga. Each night, a specific form or aspect of the goddess is venerated.

The nine forms of the goddess worshipped during Navaratri are:

1. Shailaputri: She is the embodiment of the power of Brahma, the creator of the universe. She is worshipped on the first night of Navaratri. 
2. Brahmacharini: She represents the power of penance and devotion. She is worshipped on the second night. 
3. Chandraghanta: She symbolizes beauty and grace and is worshipped on the third night. She is depicted with a crescent moon on her forehead.                                             
4. Kushmanda: She is believed to have created the universe with her divine smile. She is worshipped on the fourth night.
5. Skandamata: She is the mother of Lord Skanda (also known as Kartikeya) and is worshipped on the fifth night of Navaratri.
6. Katyayani: She represents courage and valor. She is worshipped on the sixth night.
7. Kalaratri: She is the fierce form of the goddess, representing the power to destroy ignorance and remove darkness. She is worshipped on the seventh night.                                     
8. Mahagauri: She symbolizes purity and peace. She is worshipped on the eighth night.
9. Siddhidatri: She is the bestower of supernatural powers and is worshipped on the ninth and final night of Navaratri.

During the Navadurga Pooja, devotees offer prayers, perform rituals, and recite hymns dedicated to each form of the goddess. The rituals may vary in different regions, but the underlying essence of worshipping the divine feminine power remains the same.   

Navaratri is a time of fasting, meditation, and spiritual reflection. It is believed that by worshipping the goddess with devotion and purity, one can obtain blessings, protection, and spiritual enlightenment. Overall, Navaratri and the Navadurga Pooja hold significant cultural and religious importance in  our Hinduism, highlighting the eternal power and grace of the divine feminine.