Charas is the name given to a hashish form of cannabis which is handmade in India, Pakistan and Nepal. It is made from the resin of the cannabis plant (Cannabis sativa or Cannabis indica). The plant grows wild throughout Northern India along the stretch of the Himalayas (its putative origin) and is an important cash crop for the local people. The difference between charas and hashish is that hashish is made from a dead cannabis plant and charas is made from a live one.
Hashish has been used across the Indian sub-continent for medicinal and religious purposes for thousands of years, and was sold in government shops (along with opium) during the times of the British Raj and in independent India until the 1980s (marijuana and bhang is still being sold in parts of Rajasthan and Khyber Pakhtunkhwa, a province of Pakistan).
Charas plays an important and often integral role in the culture and ritual of certain sects of the Hindu religion, especially among the Shaivs — the sub-division of Hinduism holding Lord Shiva to be the supreme god (in contrast to Vaishnavs who believe Lord Vishnu is the supreme god)—and it is venerated by some as being one of the aspects of Lord Shiva.