Starting September 8, 2025, every new line item will need to declare whether or not they will serve Eurpoean Union (EU) political ads. Display & Video 360 API and SDF uploads that don't provide declarations will fail. See our deprecations page for more details on how to update your integration to make this declaration.
Creates a new line item with settings (including targeting) inherited from the insertion order and an ENTITY_STATUS_DRAFTentityStatus. Returns the newly created line item if successful. There are default values based on the three fields:
Whether this line item will serve European Union political ads.
If containsEuPoliticalAds has been set to DOES_NOT_CONTAIN_EU_POLITICAL_ADVERTISING in the parent advertiser, then this field will be assigned DOES_NOT_CONTAIN_EU_POLITICAL_ADVERTISING if not otherwise specified. This field can then be updated using the UI, API, or Structured Data Files.
Response body
If successful, the response body contains an instance of LineItem.
[null,null,["Last updated 2025-08-21 UTC."],[],[],null,["# Method: advertisers.lineItems.generateDefault\n\n- [HTTP request](#body.HTTP_TEMPLATE)\n- [Path parameters](#body.PATH_PARAMETERS)\n- [Request body](#body.request_body)\n - [JSON representation](#body.request_body.SCHEMA_REPRESENTATION)\n- [Response body](#body.response_body)\n- [Authorization scopes](#body.aspect)\n- [Try it!](#try-it)\n\nCreates a new line item with settings (including targeting) inherited from the insertion order and an `ENTITY_STATUS_DRAFT` [entityStatus](/display-video/api/reference/rest/v4/advertisers.lineItems#LineItem.FIELDS.entity_status). Returns the newly created line item if successful. There are default values based on the three fields:\n\n- The insertion order's [insertionOrderType](/display-video/api/reference/rest/v4/advertisers.insertionOrders#InsertionOrder.FIELDS.insertion_order_type)\n- The insertion order's [automationType](/display-video/api/reference/rest/v4/advertisers.insertionOrders#InsertionOrderBudget.FIELDS.automation_type)\n- The given [lineItemType](/display-video/api/reference/rest/v4/advertisers.lineItems/generateDefault#body.request_body.FIELDS.line_item_type)\n\nYouTube \\& Partners line items cannot be created or updated using the API.\n\n### HTTP request\n\n`POST https://displayvideo.googleapis.com/v4/advertisers/{advertiserId}/lineItems:generateDefault`\n\nThe URL uses [gRPC Transcoding](https://google.aip.dev/127) syntax.\n\n### Path parameters\n\n| Parameters ||\n|----------------|---------------------------------------------------------------------------------------------------------------------------------------------------|\n| `advertiserId` | `string (`[int64](https://developers.google.com/discovery/v1/type-format)` format)` Required. The ID of the advertiser this line item belongs to. |\n\n### Request body\n\nThe request body contains data with the following structure:\n\n| JSON representation |\n|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| ``` { \"insertionOrderId\": string, \"displayName\": string, \"lineItemType\": enum (/display-video/api/reference/rest/v4/advertisers.lineItems#LineItemType), \"mobileApp\": { object (/display-video/api/reference/rest/v4/advertisers.lineItems#MobileApp) }, \"containsEuPoliticalAds\": enum (/display-video/api/reference/rest/v4/EuPoliticalAdvertisingStatus) } ``` |\n\n| Fields ||\n|--------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `insertionOrderId` | `string (`[int64](https://developers.google.com/discovery/v1/type-format)` format)` Required. The unique ID of the insertion order that the line item belongs to. |\n| `displayName` | `string` Required. The display name of the line item. Must be UTF-8 encoded with a maximum size of 240 bytes. |\n| `lineItemType` | `enum (`[LineItemType](/display-video/api/reference/rest/v4/advertisers.lineItems#LineItemType)`)` Required. The type of the line item. |\n| `mobileApp` | `object (`[MobileApp](/display-video/api/reference/rest/v4/advertisers.lineItems#MobileApp)`)` The mobile app promoted by the line item. This is applicable only when [lineItemType](/display-video/api/reference/rest/v4/advertisers.lineItems/generateDefault#body.request_body.FIELDS.line_item_type) is either `LINE_ITEM_TYPE_DISPLAY_MOBILE_APP_INSTALL` or `LINE_ITEM_TYPE_VIDEO_MOBILE_APP_INSTALL`. |\n| `containsEuPoliticalAds` | `enum (`[EuPoliticalAdvertisingStatus](/display-video/api/reference/rest/v4/EuPoliticalAdvertisingStatus)`)` Whether this line item will serve European Union political ads. If [containsEuPoliticalAds](/display-video/api/reference/rest/v4/advertisers#Advertiser.FIELDS.contains_eu_political_ads) has been set to `DOES_NOT_CONTAIN_EU_POLITICAL_ADVERTISING` in the parent advertiser, then this field will be assigned `DOES_NOT_CONTAIN_EU_POLITICAL_ADVERTISING` if not otherwise specified. This field can then be updated using the UI, API, or Structured Data Files. \u003cbr /\u003e | **Warning** : Starting **September 8, 2025** , this field must be set. If not, either the value `DOES_NOT_CONTAIN_EU_POLITICAL_ADVERTISING` will be assigned to the line item if the parent advertiser has declared that it does not serve EU political ads, or **the request will fail**. \u003cbr /\u003e |\n\n### Response body\n\nIf successful, the response body contains an instance of [LineItem](/display-video/api/reference/rest/v4/advertisers.lineItems#LineItem).\n\n### Authorization scopes\n\nRequires the following OAuth scope:\n\n- `https://www.googleapis.com/auth/display-video`\n\nFor more information, see the [OAuth 2.0 Overview](/identity/protocols/OAuth2)."]]