The idea of eight Bhairavs guarding the eight directions (four cardinal and four ordinal) is a common theme in various Purans. In the south, many villages have the shrine of 8 Vairavar (local name for Bhairav) in the eight corners of the village. Bhairava is thus acknowledged as the guardian god.
In many Jain temples, Bhairav stands along with his consort, Bhairavi, as a guardian god. In Gujarat and Rajasthan, one hears of Kala-Bhairav and Gora-Bhairav, the black and white guardians, who watch over shrines of the Goddess. Kala-Bhairav is more popularly known as Kaal, the black (Kala) referring to the black hole of time (Kaal) that consumes everything. Kaal Bhairav is associated with alcohol and wild frenzy. By contrast, Gora Bhairav or Batuk Bhairav (the small Bhairav) is visualized as a child who likes to drink milk, maybe laced with bhang.
The name Bhairav is rooted in the word ‘bhaya’ or fear. Bhairav evokes fear and takes away fear. He reminds us that fear is at the root of all human frailties. It is fear of invalidation that made Brahma cling to his creation and become arrogant. In fear, we cling to our identities like dogs cling to bones and their territories. To reinforce this message, Bhairav is associated with a dog, a symbol of attachment, as the dog wags its tail when the master smiles and whines when the master frowns. It is attachment, hence fear and insecurity, that makes us cast hexes on people and suffer from hexes cast by people. Bhairav liberates us from all.
Credits: Devdutt Pattnaik (Seven secrets of shiva)