Golem is a decentralized global supercomputer. Processing power is shared by users (providers) to applications (requestors). Ethereum based smart contract handles transaction of remuneration.
Network nodes create sandboxes isolated in providers’ machines. Golem technology then combine computations back to requestor application.
After a hyped launch in 2016 when it raised 820k ETH, software development delayed until they had its Brass Golem mainnet ready for their first use case: CGI rendering. Next in line could be machine learning.
According to the whitepaper, GNT is the utility token that is used to remunerate providers from requestors to providers and other interactions with the network according to the transaction framework.