Deferred response is a term used to refer to endpoints like ClickExport and ReportExport that take the parameters you provide, and allow you to schedule tasks to receive data at a future time.
The response from the API is thus deferred, unlike the synchronous versions of the endpoints (Clicks and Reports respectively), which will give a response right away.
Replaying a job
An existing job can be added to the queue to be processed again.
Note: Read the best practices for exporting reports to learn more.