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In HTTP, POST is a request method used to send data to a server. It is often used when uploading a file or submitting a completed web form. When a client sends a POST request, the data is enclosed in the body of the request message, most likely for storing it.
For example, when you submit a form on a website, the data you enter is sent to the server using a POST request. The server then processes the data and sends a response back to the client.