Purpose of "memory path" variable in ATestnetConsumer.sol example - chainlink

Question

Hello I'm working to create my own custom chainlink job and associated consumer.sol contract. I am using the example "ATestnetConsumer.sol" contract as a guide. (https://github.com/smartcontractkit/documentation/blob/main/_includes/samples/APIRequests/ATestnetConsumer.sol) I am confused regarding the purpose of the req variable and the path string array. What is the purpose of these when the chainlink node executes the job?
function requestEthereumLastMarket(address _oracle, string memory _jobId)
public
onlyOwner
{
Chainlink.Request memory req = buildChainlinkRequest(stringToBytes32(_jobId), address(this), this.fulfillEthereumLastMarket.selector);
req.add("get", "https://min-api.cryptocompare.com/data/pricemultifull?fsyms=ETH&tsyms=USD");
string[] memory path = new string[](4);
path[0] = "RAW";
path[1] = "ETH";
path[2] = "USD";
path[3] = "LASTMARKET";
req.addStringArray("path", path);
sendChainlinkRequestTo(_oracle, req, ORACLE_PAYMENT);
}
Edit: I did figure out what the path variable is for, it controls how you want the jsonparse function to run. For example the path listed above will parse down like this:
{"RAW": {"ETH" : {"USD" : { "LASTMARKET" : value

Answer 1

The string[] memory path is the path for the chainlink node to walk to get data from the JSON responose.
For example, if your json looks like this:
{
cat: {
tabby: 7,
cool: 2
}
}
And you wanted the cool value of 2, your path would be:
string[] memory path = new string[](2);
path[0] = "cat";
path[1] = "cool";
req.addStringArray("path", path);