0x79cc6790?0x79cc6790 is the function selector for burnFrom(address,uint256). Destroys tokens held by another address.
When a transaction's data begins with 0x79cc6790, it is calling burnFrom. The selector is the first four bytes of the keccak-256 hash of the signature burnFrom(address,uint256), which is how wallets and explorers work out which function a payload is for.