Debugging 400 error with the Postman Console

Getting 400 error but wanted to know how POstman console will help to identify the extact issue

It won’t.

Have a look at the status codes definitions.

HTTP response status codes - HTTP | MDN (mozilla.org)

400 Bad Request

The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).

This is going to be something wrong with what you are sending.

This is usually a case of reviewing the API specification.

You can use the console log to confirm what was actually sent, but then its a case of checking this against the specifications.