Many ancient Shiva Temples could be witnessed in Kashi, now Varanasi. one of them is the Bhooteshwar Temple. The importance of this Temple is mentioned in Kashi Khand.
Lord Shiva recounted the numerous deities/Shiv Lings/Teerths (Sacred Ponds) strewn over the vastness of Kashi at the request of Goddess Parvati. (Kashi Khand, Chapter 97) Kashi Khand identifies Bhooteshwar as a strong Shiv Ling in the neighbourhood of other Shiv Lings.
Devotees who worship him will be rewarded with money and prosperity in plenty.