When you want to verify your Solidity Smart Contract's code on Etherscan.io or manually make a transaction to call your contract's method, you need to encode input arguments in a special way.
ABI Encoding Service helps you to encode these arguments in a such way.
You can use auto-parse section. Just copy your ABI json interface to an input field and click a "Parse" button. After that all the necessary parameters will appear. Insert values and get the result.
Also you can manually construct your object using manual section.
Here you can read more detailed information about ABI arguments encoding.