Create an advert
If enabled, the advertiser can click on add new and create his/her advert. This is a simplified approach from what Publishers use but yields a similar result.
Publishers can allow their advertisers to configure Geo Location. When enabled a few extra options show so the advertiser can set up cities and/or countries.
And finally the advertiser can set a preferred period from when to when the advert will be displayed.
Once done the advert can be saved. This however will not make it active yet. The advert goes into a moderation queue first. So the publisher can review the advert and Approve or Reject it. For the advertiser the advert will be listed separately awaiting approval.