Yes… it is an important symbol.

Every ending is a new beginning.

In Life and everything.

In Gnosticism, a serpent biting its tail symbolised eternity and the soul of the world. The Gnostic Pistis Sophia (c. 400 CE) describes the ouroboros as a twelve-part dragon surrounding the world with its tail in its mouth.

The famous ouroboros drawing from the early alchemical text, The Chrysopoeia of Cleopatra (Κλεοπάτρας χρυσοποιία), probably originally dating to the 3rd century Alexandria, but first known in a 10th-century copy, encloses the words hen to pan (ἓν τὸ πᾶν), "the all is one". Its black and white halves may perhaps represent a Gnostic duality of existence, analogous to the Taoist yin and yang symbol.[15] The chrysopoeia ouroboros of Cleopatra the Alchemist is one of the oldest images of the ouroboros to be linked with the legendary opus of the alchemists, the philosopher's stone.

Source: https://en.wikipedia.org/wiki/Ouroboros