The video tutorial covers the use of query parameters in Postman, explaining how to set them up and their role in API requests. It discusses HTTP methods, focusing on GET and POST, and the importance of using the correct method as per the API contract. The tutorial also details how to send a JSON body in POST requests, including the necessary headers and content type. Finally, it demonstrates submitting API requests and interpreting responses, emphasizing the importance of adhering to the API contract for successful interactions.

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