gRPC REST | ### PromoteExperiment | |---| | `` rpc PromoteExperiment(`https://developers.google.com/google-ads/api/reference/rpc/v26/PromoteExperimentRequest`) returns (`https://developers.google.com/google-ads/api/reference/rpc/google.longrunning#google.longrunning.Operation`) `` Promotes the trial campaign thus applying changes in the trial campaign to the base campaign. This method returns a long running operation that tracks the promotion of the experiment campaign. If it fails, a list of errors can be retrieved using the ListExperimentAsyncErrors method. The operation's metadata will be a string containing the resource name of the created experiment. List of thrown errors: [AuthenticationError](https://developers.google.com/google-ads/api/reference/rpc/v26/AuthenticationErrorEnum.AuthenticationError) [AuthorizationError](https://developers.google.com/google-ads/api/reference/rpc/v26/AuthorizationErrorEnum.AuthorizationError) [ExperimentError](https://developers.google.com/google-ads/api/reference/rpc/v26/ExperimentErrorEnum.ExperimentError) [HeaderError](https://developers.google.com/google-ads/api/reference/rpc/v26/HeaderErrorEnum.HeaderError) [InternalError](https://developers.google.com/google-ads/api/reference/rpc/v26/InternalErrorEnum.InternalError) [QuotaError](https://developers.google.com/google-ads/api/reference/rpc/v26/QuotaErrorEnum.QuotaError) [RequestError](https://developers.google.com/google-ads/api/reference/rpc/v26/RequestErrorEnum.RequestError) | Authorization scopes : Requires the following OAuth scope: - `https://www.googleapis.com/auth/adwords` For more information, see the [OAuth 2.0 Overview](https://developers.google.com/identity/protocols/OAuth2).