Ads live under flights and contain information about the creative that will be shown, in addition to any additional targeting details that live at the ad-level. An "ad" in Kevel is different from a "creative", as an "ad" refers to creatives that are specifically linked to a flight and thus have targeting and are eligible to serve.
Ads may sometimes be referred to as Creative Flight Maps, which refers to the tying of a creative to a flight.
The advertiser of the creative must match the advertiser of the flight when creating or updating an ad.
For more detailed information on ads, please refer to the Ads technical documentation.