"PUT" is often used in RESTful web services to update or create a resource identified by a specific URL.

In RESTful web services, this method is used to request the server to update or create the resource specified by the URL. The server responds with a status code indicating the success or failure of the operation.

For example, if you want to update the details of a user with the ID "123" in a hypothetical RESTful API, you could send an HTTP PUT request to the URL:

https://example.com/users/123

You would include the updated details of the user in the body of the PUT request. The server would then attempt to update the user with the ID "123" with the new details and respond with a status code indicating the success or failure of the operation.

If the user with ID "123" did not exist, the server would create a new user with the specified details.