Ethereum classic (ETC) is the Ethereum (ETH) fork, given its similarity to Ethereum, the integration of exchanges is much easier and this is what drives the adoption of large-scale Ethereum Classic and its original ETC token.
Ethereum Classic is a blockchain-based decentralized cryptocurrency platform, and the oldest for running smart contracts.
The Ethereum platform, which is a blockchain that branched out to create Ethereum Classic, is probably the best-known smart contract platform, but many don't know it's not the oldest.