Bitcoin's current ASIC-driven blockchain uses a hashing algorithm known as SHA-256 for its job verification. However, the founders of Bitcoin Gold have replaced SHA-256 with an ASIC-resistant algorithm developed by Dmitry Khovratovich and Alex Biryukov, known as Equihash.
Equihash is not new to blockchain technology. It is being used with remarkable cryptocurrencies like Zcash's with resounding success. After Bitcoin Gold took over this algorithm, it has made Bitcoin Mining more distributed. This is the one reason why Bitcoin Gold was created