As defined in Talend Administration Center, the task fetches the relevant Job script in the relevant project from the Talend Studio Repository and generates the code.
On the Job Conductor page, the Status column shows the Job script generating status.
Once the generation is complete, the status changes to Ready to deploy. The code generated is now ready to be deployed on the execution server(s).
If you want to manually launch the generation phase, click on the relevant button on the top toolbar. For more information about the controls, see Working with Job execution tasks.