If you want for the adverts, that you post on Career site, to be paralelly posted on Indeed.com, go to Settings --> Advertisement and clauses --> Advertisement
Then, turn on the “Send all advertisements published on your Career site to Indeed automatically” and confirm the change in settings:
After turning on the integration, all the adverts published on your Career site, from Traffit, will be sent to Indeed listing.
Also, new adverts posted to Career site, will be sent to Indeed automatically.
When you turn on Indeed integration, when creating a new job advert - the "Location" field will become a required field (due to Indeed requirements).