Why Kashi is famous for pinddaan?

In Hindu ritual, the dearly departed of ancestors' spirits is called PindDaan, which is the most vital ceremonies performed along the banks of the river Ganga. By Kashi Kshetra purohit, you can find more intellectual as well as knowledgeable pandits for pindapradan in Varanasi, who can perform PindDaan in Kashi.