HelloWork is a network of job boards, media and communications agencies based in France.
To activate the HelloWork channel you need to find it in marketplace. During the activation you will need to provide a contact email. It will be used by HelloWork to identify your company among other companies with the same company name, if that is a case. So it's important to fill it as otherwise your jobs might not be published on HelloWork.
After activation, you can go to the job view and click "promote".
When you choose HelloWork you will see a simple form. After you click a "publish" button, the job ad will be processed by HelloWork team and will appear on the HelloWork shortly.