Kaala Bhairava is the fierce manifestation of Lord Shiva associated with annihilation. He is one of the most important deities of Rajasthan, Tamil Nadu and Nepal who originated in Hindu mythology and is sacred to Hindus, Buddhists and Jains alike.
He is depicted ornamented with a range of twisted serpents, which serve as earrings, bracelets, anklets, and sacred thread (yajnopavita). He wears a tiger skin and a ritual apron composed of human bones. Bhairava has a dog (Shvan) as his divine vahana (vehicle). Bhairavi is a fierce and terrifying aspect of the Devi who is virtually indistinguishable from Kali, with the exception of her particular identification as the consort of Bhairava.
Bhairava himself has eight manifestations i.e. Ashta Bhairava:
Asitanga Bhairava
Ruru Bhairava
Sanda Bhairava
Krodhana Bhairava
Unmatta Bhairava
Kapala Bhairava
Bishana Bhairava
Samhara Bhairava
Kala Bhairava is conceptualized as the Guru of the planetary deity Shani (Saturn). Bhairava is known as Bhairavar or Vairavar in Tamil where he is often presented as a Grama devata or village guardian who safeguards the devotee on all eight directions (ettu tikku). Known in Sinhalese as Bahirawa, he protects treasures. Lord Bhairava is the main deity worshipped by the Aghora sect.

---------------

The origin of Bhairava can be traced to the conversation between Lord Brahma and Lord Vishnu recounted in "Shiv Maha-Puran" where Lord Vishnu asks Lord Brahma who is the supreme creator of the Universe. Arrogantly, Brahma tells Vishnu to worship him because he (Brahma) is the supreme creator. This angered Shiva who in reality is the creator of all. Shiva then incarnated in the form of Bhairava to punish Brahma. Bhairava beheaded one of Brahma's five heads and since then Brahma has only four heads. When depicted as Kala Bhairava, Bhairava is shown carrying the decapitated head of Brahma. Cutting off Brahma's fifth head made him guilty of the crime of killing a Brahmin, and as a result, he was forced to carry around the head for years and roam as Bhikshatana, a mendicant, until he had been absolved of the sin.
In the form of the frightful Bhairava, Shiva is said to be guarding each of these Shaktipeeths. Each Shaktipeeth temple is accompanied by a temple dedicated to Bhairava.

-----------

Kalabhairava, the fearsome aspect of Lord Shiva, is the God who is the protector of Benares. Once Brahma insulted Lord Shiva and his fifth head teasingly laughed at Lord Shiva. From Lord Shiva came out the Kalabhairava (Black Bhairava) who tore off the fifth head of Lord Brahma. On the entreaties of Lord Vishnu, Shiva pardoned Lord Brahma. But the sin of beheading Lord Brahma followed Kalabhairava everywhere. Also the head of Brahma stuck to him. To keep away the sin and punishment which were chasing him, Kalabhairava entered the city of Benares. The sin could not enter the city. Kalabhairava was made as the Kotwa of Benares. Kalabhairava rides on a dog. A pilgrimage to Kasi is not supposed to be complete without visiting the temple of Kalabhairava.
Another story identifies Kalabhairava with Veerabhadra who cut off the head of Daksha the father of Sathi Devi, when he insulted Lord Shiva. Sathi’s body was cut into pieces and strewn all over India giving rise to Shakthi Peetas. Outside every Shakthi Peeta is the temple for Bhairava.
In another story, Kalabhairava is the form of Shiva who controls the growth and management of time. Whoever wants to spend, manage or ration their time in a proper manner should pray him.
He is also considered as the guardian of temples of Lord Shiva. After locking the doors of the temple of Lord Shiva, the keys are ceremonially offered to Bhairava.
This ashtakam is recited by the priests of the temple of Kalabhairava in Benares before blessing the devotee with a tap by the cane of Lord Kalabhairava.

--------------

Lord Bhairav protects, removes all obstacles, cleans the soul with his sheer intensity and makes things favourable for a sadhak

The best way is to feed 11 dogs on every saturday evening or daily ( as per comfort of sadhak) . The dogs should be feeded halwa puri ( Indian bread with sweat dish ), all problems gets solved automatically by doing this.