Hanuman is a "Vanara" (a monkey-like humanoid deity), a devotee of Rama, and one of the central characters in the Sanskrit epic Ramayana. Folk tales increasingly eulogise the powers of Hanuman, and he is considered by many to be an avatar of the god Shiva. The qualities of Hanuman – his strength, courage, wisdom, celibacy, devotion to Rama and the many names by which he was known – are detailed in the Hanuman Chalisa. There are more temples devoted to Hanuman than any other deity in India, and recitation of the Hanuman Chalisa is a common religious practice.
Tulsidas says in the last stanza of the Hanuman Chalisa that whoever chants it with full devotion to Hanuman, will have Hanuman's grace. Amongst Hindus, it is a very popular belief that chanting the Hanuman Chalisa invokes Hanuman's divine intervention in grave problems, including those concerning evil spirits.
Jai Shree Hanuman!