0x095ea7b3?0x095ea7b3 is the function selector for approve(address,uint256). Grants permission to spend your tokens.
When a transaction's data begins with 0x095ea7b3, it is calling approve. The selector is the first four bytes of the keccak-256 hash of the signature approve(address,uint256), which is how wallets and explorers work out which function a payload is for.