202 Accepted
Meaning
The request has been received but not yet acted upon; processing will happen asynchronously.
When to Use
When the server accepts a request for processing, but the processing is not completed when the response is sent (e.g., long-running job, batch processing).
Example
Submitting a background job returns 202 Accepted to indicate the request was received and will be processed later.
When Not to Use
Do not use if the server has already completed the action and can provide a synchronous response.
Source
RFC 9110