204 No Content
Meaning
The server successfully processed the request and is not returning any content in the body.
When to Use
When a request is successful but there is no need to return a body (commonly after executing a DELETE or when updating a resource without returning data).
Example
DELETE /api/items/123 returns 204 No Content on successful deletion with no response body.
When Not to Use
Do not use if there is content to send in the response. Any content in a 204 response will be ignored by the client.
Source
RFC 9110