The Om̐ or Aum is of major importance in Hinduism. This symbol is a sacred syllable representing Brahma, the impersonal Absolute - almighty, omnipresent and the source of all manifest existence.
This syllable represents the totality of what exists, as well as the Hindu trinity, it is the symbol of the absolute universe. It is considered to be the original, primordial sound, "the murmur of the universe".
If you connect to this symbol you will be able to be in harmony, in resonance with the universal conscience. In this symbol we also find the 4 elements.