Can you explain what is meant by the HTTP method PUT?

The HTTP PUT method is used to create or replace a resource at the specified URL. If the resource exists, it will be completely replaced with the request content; if not, a new one will be created. Unlike POST, which typically adds a new resource, PUT is idempotent: repeated requests with the same data will not change the result after the first.

Example of using PUT to update a user:

PUT /users/123 HTTP/1.1
Content-Type: application/json

{
  "name": "Ivan Ivanov",
  "email": "ivan@example.com"
}

This request will replace the data of the user with ID 123 with the new data.