Create experiments

Experiments are an interface to manage experimental campaigns related to a base campaign. Experiment campaigns are full-fledged campaigns that can serve ads and accrue clicks, cost, and other metrics.

The first step in running an experiment using the Google Ads API is to create an Experiment. This resource defines some key information about the experiment you want to run, such as a name and experiment type. You do not specify any of the campaigns involved in the experiment at this step.

Here's an overview of some key fields for an Experiment:

name: Each experiment must have a unique name.
description: An optional field that you can use to reference later. Does not affect how the experiment runs.
suffix: The suffix will be appended to the end of the names of the treatment campaigns so you can distinguish them from the control campaign. These concepts will be explained further in the experiment arms page.
type: What type of experiment to run. There are many types here, but most of them are system experiments. For your custom experiments, you'll want to specify either SEARCH_CUSTOM or DISPLAY_CUSTOM.
status: When creating an experiment, set this field to SETUP. Later on, once you begin the experiment, this field will let you check what it's currently doing
start_date and end_date: Specify when the experiment should start and end.
sync_enabled: Disabled by default. If set to true, changes made to the original campaign while your experiment is running are automatically copied to the experiment campaign. Learn more.

Here's an example of creating an experiment:

Java

private String createExperimentResource(GoogleAdsClient googleAdsClient, long customerId) {
  ExperimentOperation operation =
      ExperimentOperation.newBuilder()
          .setCreate(
              Experiment.newBuilder()
                  // Name must be unique.
                  .setName("Example Experiment #" + getPrintableDateTime())
                  .setType(ExperimentType.SEARCH_CUSTOM)
                  .setSuffix("[experiment]")
                  .setStatus(ExperimentStatus.SETUP)
                  .build())
          .build();

  try (ExperimentServiceClient experimentServiceClient =
      googleAdsClient.getLatestVersion().createExperimentServiceClient()) {
    MutateExperimentsResponse response =
        experimentServiceClient.mutateExperiments(
            Long.toString(customerId), ImmutableList.of(operation));
    String experiment = response.getResults(0).getResourceName();
    System.out.printf("Created experiment with resource name '%s'%n", experiment);
    return experiment;
  }
}CreateExperiment.java

C#

/// <summary>
/// Creates the experiment.
/// </summary>
/// <param name="client">The Google Ads client.</param>
/// <param name="customerId">The customer ID for which the call is made.</param>
/// <returns>The resource name of the newly created experiment.</returns>
private static string CreateAnExperiment(GoogleAdsClient client, long customerId)
{
    // Get the ExperimentService.
    ExperimentServiceClient experimentService = client.GetService(
        Services.V18.ExperimentService);

    // Creates the experiment.
    Experiment experiment = new Experiment()
    {
        // Name must be unique.
        Name = $"Example Experiment #{ExampleUtilities.GetRandomString()}",
        Type = ExperimentType.SearchCustom,
        Suffix = "[experiment]",
        Status = ExperimentStatus.Setup
    };

    // Creates the operation.
    ExperimentOperation operation = new ExperimentOperation()
    {
        Create = experiment
    };

    // Makes the API call.
    MutateExperimentsResponse response = experimentService.MutateExperiments(
        customerId.ToString(), new[] { operation });

    // Displays the result.
    string experimentResourceName = response.Results.First().ResourceName;

    Console.WriteLine($"Created experiment with resource name " +
        $"'{experimentResourceName}'.");
    return experimentResourceName;
}
CreateExperiment.cs

PHP

private static function createExperimentResource(
    ExperimentServiceClient $experimentServiceClient,
    int $customerId
): string {
    // Creates an experiment and its operation.
    $experiment = new Experiment([
        // Name must be unique.
        'name' => 'Example Experiment #' . Helper::getPrintableDatetime(),
        'type' => ExperimentType::SEARCH_CUSTOM,
        'suffix' => '[experiment]',
        'status' => ExperimentStatus::SETUP
    ]);
    $experimentOperation = new ExperimentOperation(['create' => $experiment]);

    // Issues a request to create the experiment.
    $response = $experimentServiceClient->mutateExperiments(
        MutateExperimentsRequest::build($customerId, [$experimentOperation])
    );
    $experimentResourceName = $response->getResults()[0]->getResourceName();
    print "Created experiment with resource name '$experimentResourceName'" . PHP_EOL;

    return $experimentResourceName;
}CreateExperiment.php

Python

def create_experiment_resource(client, customer_id):
    """Creates a new experiment resource.

    Args:
        client: an initialized GoogleAdsClient instance.
        customer_id: a client customer ID.

    Returns:
        the resource name for the new experiment.
    """
    experiment_operation = client.get_type("ExperimentOperation")
    experiment = experiment_operation.create

    experiment.name = f"Example Experiment #{uuid.uuid4()}"
    experiment.type_ = client.enums.ExperimentTypeEnum.SEARCH_CUSTOM
    experiment.suffix = "[experiment]"
    experiment.status = client.enums.ExperimentStatusEnum.SETUP

    experiment_service = client.get_service("ExperimentService")
    response = experiment_service.mutate_experiments(
        customer_id=customer_id, operations=[experiment_operation]
    )

    experiment_resource_name = response.results[0].resource_name
    print(f"Created experiment with resource name {experiment_resource_name}")

    return experiment_resource_namecreate_experiment.py

Ruby

def create_experiment_resource(client, customer_id)
  operation = client.operation.create_resource.experiment do |e|
    # Name must be unique.
    e.name = "Example Experiment #{(Time.new.to_f * 1000).to_i}"
    e.type = :SEARCH_CUSTOM
    e.suffix = '[experiment]'
    e.status = :SETUP
  end

  response = client.service.experiment.mutate_experiments(
    customer_id: customer_id,
    operations: [operation],
  )

  experiment = response.results.first.resource_name
  puts "Created experiment with resource name #{experiment}."

  experiment
endcreate_experiment.rb

Perl

sub create_experiment_resource {
  my ($api_client, $customer_id) = @_;

  my $experiment = Google::Ads::GoogleAds::V18::Resources::Experiment->new({
    # Name must be unique.
    name   => "Example Experiment #" . uniqid(),
    type   => SEARCH_CUSTOM,
    suffix => "[experiment]",
    status => SETUP
  });

  my $operation =
    Google::Ads::GoogleAds::V18::Services::ExperimentService::ExperimentOperation
    ->new({
      create => $experiment
    });

  my $response = $api_client->ExperimentService()->mutate({
      customerId => $customer_id,
      operations => [$operation]});

  my $resource_name = $response->{results}[0]{resourceName};
  printf "Created experiment with resource name '%s'.\n", $resource_name;
  return $resource_name;
}create_experiment.pl

Overview

Create experiment arms