Kaal Bhairava is a fierce form of Lord Shiva. Known as the protector of time and space, Kaal Bhairav ji removes fear and negativity from the lives of the devotees. Kaal Bhairav ji is also called Kotwal of Kashi, and it’s believed that he protects the city and one can’t enter the city without his blessings.
ॐ काल भैरवाय नमः
Om Kaal Bhairavaya Namah
The mantra, Om Kaal Bhairavaya Namah, is a naam mantra and has salutations to Lord Kaal Bhairav. Even though it is just a naam (name) mantra, it is often advised to first know about Bhairav ji. As Bhairav Ji is a fierce form of Lord Shiva, his energies are quite different and stronger.