A Demand Gen multi asset ad.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/common/ad_type_infos.proto)

| Fields ||
|---|---|
| ## `business_name` | `string` The Advertiser/brand name. Maximum display width is 25. Required. |
| ## `call_to_action_text` | `string` Call to action text. |
| ## `classic_display_images[]` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AdImageAsset` Classic display image assets to be used in the ad. Valid image types are GIF, JPEG, and PNG. At most 20 classic display images can be specified per ad. |
| ## `descriptions[]` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AdTextAsset` The descriptive text of the ad. Maximum display width is 90. At least 1 and max 5 descriptions can be specified. |
| ## `headlines[]` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AdTextAsset` Headline text asset of the ad. Maximum display width is 30. At least 1 and max 5 headlines can be specified. |
| ## `logo_images[]` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AdImageAsset` Logo image assets to be used in the ad. Valid image types are GIF, JPEG, and PNG. The minimum size is 128x128 and the aspect ratio must be 1:1 (+-1%). At least 1 and max 5 logo images can be specified. |
| ## `marketing_images[]` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AdImageAsset` Marketing image assets to be used in the ad. Valid image types are GIF, JPEG, and PNG. The minimum size is 600x314 and the aspect ratio must be 1.91:1 (+-1%). Required if square_marketing_images is not present. Combined with `square_marketing_images`, `portrait_marketing_images`, and `tall_portrait_marketing_images` the maximum is 20. |
| ## `portrait_marketing_images[]` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AdImageAsset` Portrait marketing image assets to be used in the ad. Valid image types are GIF, JPEG, and PNG. The minimum size is 480x600 and the aspect ratio must be 4:5 (+-1%). Combined with `marketing_images`, `square_marketing_images`, and `tall_portrait_marketing_images` the maximum is 20. |
| ## `square_marketing_images[]` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AdImageAsset` Square marketing image assets to be used in the ad. Valid image types are GIF, JPEG, and PNG. The minimum size is 300x300 and the aspect ratio must be 1:1 (+-1%). Required if marketing_images is not present. Combined with `marketing_images`, `portrait_marketing_images`, and `tall_portrait_marketing_images` the maximum is 20. |
| ## `tall_portrait_marketing_images[]` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AdImageAsset` Tall portrait marketing image assets to be used in the ad. Valid image types are GIF, JPEG, and PNG. The minimum size is 600x1067 and the aspect ratio must be 9:16 (+-1%). Combined with `marketing_images`, `square_marketing_images`, and `portrait_marketing_images`, the maximum is 20. |