The answer to this question depends on the specific mythology or pantheon you are referring to. Here are some examples:
Greek Mythology
In Greek mythology, the Mother of the Gods is Rhea, a Titaness and the wife of Cronus. She is known for giving birth to the major Olympian gods, including Zeus, Poseidon, Hades, Hera, Demeter, and Hestia.
Roman Mythology
In Roman mythology, the equivalent of Rhea is Cybele, a powerful mother goddess associated with nature, fertility, and wild animals. She is often depicted as a majestic figure with a crown of towers and a lion by her side.
Norse Mythology
In Norse mythology, the Mother of the Gods is Frigg, the wife of Odin. She is known for her wisdom, her ability to see the future, and her role as the protector of marriage and motherhood.
Egyptian Mythology
In Egyptian mythology, the Mother of the Gods is Nut, the goddess of the sky. She is often depicted as a woman with a star-studded body, arching over the earth and holding the sun god Ra.
Other Mythologies
Many other mythologies around the world feature powerful mother goddesses who are considered the mothers of the gods. These include Isis in Egyptian mythology, Inanna in Sumerian mythology, and Anahita in Persian mythology.
These are just a few examples of the many different mother goddesses who are revered in various mythologies. The specific answer to your question will depend on the specific mythology you are interested in.