0xe8e33700?0xe8e33700 is the function selector for addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256). Adds liquidity to a pool.
When a transaction's data begins with 0xe8e33700, it is calling addLiquidity. The selector is the first four bytes of the keccak-256 hash of the signature addLiquidity(address,address,uint256,uint256,uint256,uint256,address,uint256), which is how wallets and explorers work out which function a payload is for.