- POST is used to submit data to be processed by the server, often resulting in the creation of a new resource. It sends data to the server and is not idempotent, meaning multiple POST requests may create multiple resources.
- PUT is used to update an existing resource or create it if it doesn’t exist. It sends data to a specific resource URL and is idempotent, meaning multiple PUT requests with the same data will have the same effect without creating duplicates.
In summary, POST creates new resources, while PUT updates or replaces existing ones.