The Om represents God, Creation, and the Oneness of all creation. It is most commonly used in Buddhist and Hindu religions. Om is more specifically called Pranava, which means, “it infiltrates life and runs through our breath.”
The first breath of creation signifies that Om is the primordial sound. Om is often seen as the utmost of all mantras or vibrations. Today Om is often practiced as a part of yoga.
The symbol representing Om is called the Omkar, and has four parts, representing the four states of human awareness:
The ordinary waking or material state
The state of deep sleep
The dream state
Absolute conscience or the awakened state