Portfolio and Standard Bidding Strategies

Portfolio bidding strategies are automated, goal-driven bidding strategies that can be shared among multiple campaigns, whereas standard bidding strategies are not shared and can only be used by a single campaign. The API supports creating both types of strategies. Portfolio bidding strategies are created as standalone objects in an account, whereas standard strategies are managed by setting appropriate fields on a campaign.

Portfolio bidding strategies

To use a portfolio bidding strategy with your campaign, you have two options:

  1. Use an existing BiddingStrategy.
  2. Use MutateBiddingStrategies to create a new one with the fields name and scheme set. As an example, for a TARGET_SPEND bidding strategy, set the field target_spend with a new object typed as TargetSpend.

Once you've chosen a BiddingStrategy, configure your campaign to use it by setting the campaign's bidding_strategy field to its resource_name.

The following example demonstrates how to create a new portfolio TARGET_SPEND bidding strategy for a new campaign.

Java

private String createBiddingStrategy(GoogleAdsClient googleAdsClient, long customerId) {
  try (BiddingStrategyServiceClient biddingStrategyServiceClient =
      googleAdsClient.getLatestVersion().createBiddingStrategyServiceClient()) {
    // Creates a portfolio bidding strategy.
    TargetSpend targetSpend = TargetSpend.newBuilder().setCpcBidCeilingMicros(2_000_000L).build();
    BiddingStrategy portfolioBiddingStrategy =
        BiddingStrategy.newBuilder()
            .setName("Maximize Clicks #" + getPrintableDateTime())
            .setTargetSpend(targetSpend)
            .build();
    // Constructs an operation that will create a portfolio bidding strategy.
    BiddingStrategyOperation operation =
        BiddingStrategyOperation.newBuilder().setCreate(portfolioBiddingStrategy).build();
    // Sends the operation in a mutate request.
    MutateBiddingStrategiesResponse response =
        biddingStrategyServiceClient.mutateBiddingStrategies(
            Long.toString(customerId), Lists.newArrayList(operation));

    MutateBiddingStrategyResult mutateBiddingStrategyResult = response.getResults(0);
    // Prints the resource name of the created object.
    System.out.printf(
        "Created portfolio bidding strategy with resource name: '%s'.%n",
        mutateBiddingStrategyResult.getResourceName());

    return mutateBiddingStrategyResult.getResourceName();
  }
}
UsePortfolioBiddingStrategy.java

C#

private string CreatePortfolioBiddingStrategy(GoogleAdsClient client,
    long customerId, string name, long bidCeiling)
{
    // Get the BiddingStrategyService.
    BiddingStrategyServiceClient biddingStrategyService = client.GetService(
        Services.V18.BiddingStrategyService);

    // Create a portfolio bidding strategy.
    BiddingStrategy biddingStrategy = new BiddingStrategy()
    {
        Name = name,

        TargetSpend = new TargetSpend()
        {
            CpcBidCeilingMicros = bidCeiling,
        }
    };

    // Create operation.
    BiddingStrategyOperation biddingOperation = new BiddingStrategyOperation()
    {
        Create = biddingStrategy
    };

    // Create the portfolio bidding strategy.
    MutateBiddingStrategiesResponse biddingResponse =
        biddingStrategyService.MutateBiddingStrategies(
            customerId.ToString(), new BiddingStrategyOperation[] { biddingOperation });

    return biddingResponse.Results[0].ResourceName;
}
UsePortfolioBiddingStrategy.cs

PHP

private static function createBiddingStrategy(GoogleAdsClient $googleAdsClient, int $customerId)
{
    // Creates a portfolio bidding strategy.
    $portfolioBiddingStrategy = new BiddingStrategy([
        'name' => 'Maximize Clicks #' . Helper::getPrintableDatetime(),
        'target_spend' => new TargetSpend([
            'cpc_bid_ceiling_micros' => 2000000
        ])
    ]);

    // Constructs an operation that will create a portfolio bidding strategy.
    $biddingStrategyOperation = new BiddingStrategyOperation();
    $biddingStrategyOperation->setCreate($portfolioBiddingStrategy);

    // Issues a mutate request to create the bidding strategy.
    $biddingStrategyServiceClient = $googleAdsClient->getBiddingStrategyServiceClient();
    $response = $biddingStrategyServiceClient->mutateBiddingStrategies(
        MutateBiddingStrategiesRequest::build($customerId, [$biddingStrategyOperation])
    );
    /** @var BiddingStrategy $addedBiddingStrategy */
    $addedBiddingStrategy = $response->getResults()[0];

    // Prints out the resource name of the created bidding strategy.
    printf(
        "Created portfolio bidding strategy with resource name: '%s'.%s",
        $addedBiddingStrategy->getResourceName(),
        PHP_EOL
    );

    return $addedBiddingStrategy->getResourceName();
}
UsePortfolioBiddingStrategy.php

Python

# Create a portfolio bidding strategy.
bidding_strategy_operation = client.get_type("BiddingStrategyOperation")
bidding_strategy = bidding_strategy_operation.create
bidding_strategy.name = f"Enhanced CPC {uuid.uuid4()}"
target_spend = bidding_strategy.target_spend
target_spend.cpc_bid_ceiling_micros = 2000000

# Add portfolio bidding strategy.
try:
    bidding_strategy_response = (
        bidding_strategy_service.mutate_bidding_strategies(
            customer_id=customer_id, operations=[bidding_strategy_operation]
        )
    )
    bidding_strategy_id = bidding_strategy_response.results[0].resource_name
    print(f'Created portfolio bidding strategy "{bidding_strategy_id}".')
except GoogleAdsException as ex:
    handle_googleads_exception(ex)
use_portfolio_bidding_strategy.py

Ruby

# Create a portfolio bidding strategy.
bidding_strategy = client.resource.bidding_strategy do |bs|
  bs.name = "Enhanced CPC ##{(Time.new.to_f * 1000).to_i}"
  bs.target_spend = client.resource.target_spend do |ts|
    ts.cpc_bid_ceiling_micros = 2_000_000
  end
end

operation = client.operation.create_resource.bidding_strategy(bidding_strategy)

response = client.service.bidding_strategy.mutate_bidding_strategies(
  customer_id: customer_id,
  operations: [operation],
)
bidding_id = response.results.first.resource_name

puts "Portfolio bidding strategy #{bidding_id} was created"
use_portfolio_bidding_strategy.rb

Perl

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

  # Create a portfolio bidding strategy.
  my $portfolio_bidding_strategy =
    Google::Ads::GoogleAds::V18::Resources::BiddingStrategy->new({
      name        => "Maximize Clicks #" . uniqid(),
      targetSpend => Google::Ads::GoogleAds::V18::Common::TargetSpend->new({
          cpcBidCeilingMicros => 2000000
        }
      ),
    });

  # Create a bidding strategy operation.
  my $bidding_strategy_operation =
    Google::Ads::GoogleAds::V18::Services::BiddingStrategyService::BiddingStrategyOperation
    ->new({
      create => $portfolio_bidding_strategy
    });

  # Add the bidding strategy.
  my $bidding_strategies_response =
    $api_client->BiddingStrategyService()->mutate({
      customerId => $customer_id,
      operations => [$bidding_strategy_operation]});

  my $bidding_strategy_resource_name =
    $bidding_strategies_response->{results}[0]{resourceName};

  printf "Created portfolio bidding strategy with resource name: '%s'.\n",
    $bidding_strategy_resource_name;

  return $bidding_strategy_resource_name;
}
use_portfolio_bidding_strategy.pl

Java

Campaign campaign =
    Campaign.newBuilder()
        .setName("Interplanetary Cruise #" + getPrintableDateTime())
        .setStatus(CampaignStatus.PAUSED)
        .setCampaignBudget(campaignBudgetResourceName)
        .setBiddingStrategy(biddingStrategyResourceName)
        .setAdvertisingChannelType(AdvertisingChannelType.SEARCH)
        .setNetworkSettings(networkSettings)
        .build();
UsePortfolioBiddingStrategy.java

C#

// Create the campaign.
Campaign campaign = new Campaign()
{
    Name = name,
    AdvertisingChannelType = AdvertisingChannelType.Search,

    // Recommendation: Set the campaign to PAUSED when creating it to prevent
    // the ads from immediately serving. Set to ENABLED once you've added
    // targeting and the ads are ready to serve.
    Status = CampaignStatus.Paused,

    // Set the campaign budget.
    CampaignBudget = campaignBudgetResourceName,

    // Set bidding strategy (required).
    BiddingStrategy = biddingStrategyResourceName,

    // Set the campaign network options.
    NetworkSettings = new NetworkSettings()
    {
        TargetGoogleSearch = true,
        TargetSearchNetwork = true,
        TargetContentNetwork = true,
        TargetPartnerSearchNetwork = false
    }
};
UsePortfolioBiddingStrategy.cs

PHP

// Creates a Search campaign.
$campaign = new Campaign([
    'name' => 'Interplanetary Cruise #' . Helper::getPrintableDatetime(),
    'advertising_channel_type' => AdvertisingChannelType::SEARCH,
    // Recommendation: Set the campaign to PAUSED when creating it to prevent
    // the ads from immediately serving. Set to ENABLED once you've added
    // targeting and the ads are ready to serve.
    'status' => CampaignStatus::PAUSED,
    // Configures the campaign network options.
    'network_settings' => new NetworkSettings([
        'target_google_search' => true,
        'target_search_network' => true,
        'target_content_network' => true,
    ]),
    // Sets the bidding strategy and budget.
    'bidding_strategy' => $biddingStrategyResourceName,
    'campaign_budget' => $campaignBudgetResourceName
]);
UsePortfolioBiddingStrategy.php

Python

# Create campaign.
campaign_operation = client.get_type("CampaignOperation")
campaign = campaign_operation.create
campaign.name = f"Interplanetary Cruise {uuid.uuid4()}"
campaign.advertising_channel_type = (
    client.enums.AdvertisingChannelTypeEnum.SEARCH
)

# Recommendation: Set the campaign to PAUSED when creating it to prevent the
# ads from immediately serving. Set to ENABLED once you've added targeting
# and the ads are ready to serve.
campaign.status = client.enums.CampaignStatusEnum.PAUSED

# Set the bidding strategy and budget.
campaign.bidding_strategy = bidding_strategy_id
campaign.manual_cpc.enhanced_cpc_enabled = True
campaign.campaign_budget = campaign_budget_id

# Set the campaign network options.
campaign.network_settings.target_google_search = True
campaign.network_settings.target_search_network = True
campaign.network_settings.target_content_network = False
campaign.network_settings.target_partner_search_network = False
use_portfolio_bidding_strategy.py

Ruby

# Create campaigns.
campaigns = 2.times.map do |i|
  client.resource.campaign do |c|
    c.name = "Interplanetary Cruise ##{(Time.new.to_f * 1000).to_i + i}"
    c.status = :PAUSED
    c.bidding_strategy = bidding_id
    c.campaign_budget = budget_id
    c.advertising_channel_type = :SEARCH
    c.network_settings = client.resource.network_settings do |ns|
      ns.target_google_search = true
      ns.target_search_network = true
      ns.target_content_network = false
      ns.target_partner_search_network = false
    end
  end
end
use_portfolio_bidding_strategy.rb

Perl

# Create a search campaign.
my $campaign = Google::Ads::GoogleAds::V18::Resources::Campaign->new({
    name                   => "Interplanetary Cruise #" . uniqid(),
    advertisingChannelType => SEARCH,
    # Recommendation: Set the campaign to PAUSED when creating it to stop
    # the ads from immediately serving. Set to ENABLED once you've added
    # targeting and the ads are ready to serve.
    status => PAUSED,
    # Configures the campaign network options.
    networkSettings =>
      Google::Ads::GoogleAds::V18::Resources::NetworkSettings->new({
        targetGoogleSearch   => "true",
        targetSearchNetwork  => "true",
        targetContentNetwork => "true"
      }
      ),
    # Set the bidding strategy and budget.
    biddingStrategy => $bidding_strategy_resource_name,
    campaignBudget  => $campaign_budget_resource_name
  });
use_portfolio_bidding_strategy.pl

An existing portfolio bidding strategy can be linked to a shared budget. Once the two are associated, the shared budget will always be associated with the campaigns that are part of the bidding strategy.

You can only link together a portfolio bidding strategy and an existing shared budget—you cannot create one of the two and immediately associate it with the other.

To associate a BiddingStrategy with a CampaignBudget, send a MutateOperation that updates the two entities, setting the aligned_budget_id field in the bidding strategy to the ID of the shared budget and the aligned_bidding_strategy field in the campaign budget to the ID of the portfolio bidding strategy.

Standard bidding strategies

To use a standard bidding strategy with your campaign, set the campaign as follows:

This example demonstrates how to set a standard MAXIMIZE_CONVERSION_VALUE bidding strategy when creating a new campaign:

Java

/** Creates a MutateOperation that creates a new Performance Max campaign. */
private MutateOperation createPerformanceMaxCampaignOperation(long customerId) {
  Campaign performanceMaxCampaign =
      Campaign.newBuilder()
          .setName("Performance Max campaign #" + getPrintableDateTime())
          // Sets the campaign status as PAUSED. The campaign is the only entity in
          // the mutate request that should have its status set.
          .setStatus(CampaignStatus.PAUSED)
          // All Performance Max campaigns have an advertising_channel_type of
          // PERFORMANCE_MAX. The advertising_channel_sub_type should not be set.
          .setAdvertisingChannelType(AdvertisingChannelType.PERFORMANCE_MAX)
          // Bidding strategy must be set directly on the campaign.
          // Setting a portfolio bidding strategy by resource name is not supported.
          // Max Conversion and Maximize Conversion Value are the only strategies
          // supported for Performance Max campaigns.
          // An optional ROAS (Return on Advertising Spend) can be set for
          // maximize_conversion_value. The ROAS value must be specified as a ratio in
          // the API. It is calculated by dividing "total value" by "total spend".
          // For more information on Maximize Conversion Value, see the support
          // article: http://support.google.com/google-ads/answer/7684216.
          // A targetRoas of 3.5 corresponds to a 350% return on ad spend.
          .setMaximizeConversionValue(
              MaximizeConversionValue.newBuilder().setTargetRoas(3.5).build())
          // Sets the Final URL expansion opt out. This flag is specific to
          // Performance Max campaigns. If opted out (True), only the final URLs in
          // the asset group or URLs specified in the advertiser's Google Merchant
          // Center or business data feeds are targeted.
          // If opted in (False), the entire domain will be targeted. For best
          // results, set this value to false to opt in and allow URL expansions. You
          // can optionally add exclusions to limit traffic to parts of your website.
          .setUrlExpansionOptOut(false)
          // Assigns the resource name with a temporary ID.
          .setResourceName(
              ResourceNames.campaign(customerId, PERFORMANCE_MAX_CAMPAIGN_TEMPORARY_ID))
          // Sets the budget using the given budget resource name.
          .setCampaignBudget(ResourceNames.campaignBudget(customerId, BUDGET_TEMPORARY_ID))
          // Optional fields.
          .setStartDate(new DateTime().plusDays(1).toString("yyyyMMdd"))
          .setEndDate(new DateTime().plusDays(365).toString("yyyyMMdd"))
          .build();

  return MutateOperation.newBuilder()
      .setCampaignOperation(
          CampaignOperation.newBuilder().setCreate(performanceMaxCampaign).build())
      .build();
}

AddPerformanceMaxCampaign.java

C#

/// Creates a MutateOperation that creates a new Performance Max campaign.
/// <param name="campaignResourceName">The campaign resource name.</param>
/// <param name="campaignBudgetResourceName">The campaign budget resource name.</param>
/// <returns>A MutateOperations that will create this new campaign.</returns>
private MutateOperation CreatePerformanceMaxCampaignOperation(
    string campaignResourceName,
    string campaignBudgetResourceName)
{
    MutateOperation operation = new MutateOperation()
    {
        CampaignOperation = new CampaignOperation()
        {
            Create = new Campaign()
            {
                Name = "Performance Max campaign #" + ExampleUtilities.GetRandomString(),

                // Set the campaign status as PAUSED. The campaign is the only entity in
                // the mutate request that should have its status set.
                Status = CampaignStatus.Paused,

                // All Performance Max campaigns have an AdvertisingChannelType of
                // PerformanceMax. The AdvertisingChannelSubType should not be set.
                AdvertisingChannelType = AdvertisingChannelType.PerformanceMax,

                // Bidding strategy must be set directly on the campaign. Setting a
                // portfolio bidding strategy by resource name is not supported. Max
                // Conversion and Maximize Conversion Value are the only strategies
                // supported for Performance Max campaigns. BiddingStrategyType is
                // read-only and cannot be set by the API. An optional ROAS (Return on
                // Advertising Spend) can be set to enable the MaximizeConversionValue
                // bidding strategy. The ROAS value must be specified as a ratio in the API.
                // It is calculated by dividing "total value" by "total spend".
                //
                // For more information on Maximize Conversion Value, see the support
                // article:
                // http://support.google.com/google-ads/answer/7684216.
                //
                // A target_roas of 3.5 corresponds to a 350% return on ad spend.
                MaximizeConversionValue = new MaximizeConversionValue()
                {
                    TargetRoas = 3.5
                },

                // Set the Final URL expansion opt out. This flag is specific to
                // Performance Max campaigns. If opted out (True), only the final URLs in
                // the asset group or URLs specified in the advertiser's Google Merchant
                // Center or business data feeds are targeted.
                // If opted in (False), the entire domain will be targeted. For best
                // results, set this value to false to opt in and allow URL expansions. You
                // can optionally add exclusions to limit traffic to parts of your website.
                UrlExpansionOptOut = false,

                // Use the temporary resource name created earlier
                ResourceName = campaignResourceName,

                // Set the budget using the given budget resource name.
                CampaignBudget = campaignBudgetResourceName,

                // Optional fields
                StartDate = DateTime.Now.AddDays(1).ToString("yyyyMMdd"),
                EndDate = DateTime.Now.AddDays(365).ToString("yyyyMMdd")
            }
        }
    };

    return operation;
}

AddPerformanceMaxCampaign.cs

PHP

private static function createPerformanceMaxCampaignOperation(int $customerId): MutateOperation
{
    // Creates a mutate operation that creates a campaign operation.
    return new MutateOperation([
        'campaign_operation' => new CampaignOperation([
            'create' => new Campaign([
                'name' => 'Performance Max campaign #' . Helper::getPrintableDatetime(),
                // Assigns the resource name with a temporary ID.
                'resource_name' => ResourceNames::forCampaign(
                    $customerId,
                    self::PERFORMANCE_MAX_CAMPAIGN_TEMPORARY_ID
                ),
                // Sets the budget using the given budget resource name.
                'campaign_budget' => ResourceNames::forCampaignBudget(
                    $customerId,
                    self::BUDGET_TEMPORARY_ID
                ),
                // The campaign is the only entity in the mutate request that should have its
                // status set.
                // Recommendation: Set the campaign to PAUSED when creating it to prevent
                // the ads from immediately serving.
                'status' => CampaignStatus::PAUSED,
                // All Performance Max campaigns have an advertising_channel_type of
                // PERFORMANCE_MAX. The advertising_channel_sub_type should not be set.
                'advertising_channel_type' => AdvertisingChannelType::PERFORMANCE_MAX,

                // Bidding strategy must be set directly on the campaign.
                // Setting a portfolio bidding strategy by resource name is not supported.
                // Max Conversion and Maximize Conversion Value are the only strategies
                // supported for Performance Max campaigns.
                // An optional ROAS (Return on Advertising Spend) can be set for
                // maximize_conversion_value. The ROAS value must be specified as a ratio in
                // the API. It is calculated by dividing "total value" by "total spend".
                // For more information on Maximize Conversion Value, see the support
                // article: http://support.google.com/google-ads/answer/7684216.
                // A target_roas of 3.5 corresponds to a 350% return on ad spend.
                'maximize_conversion_value' => new MaximizeConversionValue([
                    'target_roas' => 3.5
                ]),

                // Sets the Final URL expansion opt out. This flag is specific to
                // Performance Max campaigns. If opted out (true), only the final URLs in
                // the asset group or URLs specified in the advertiser's Google Merchant
                // Center or business data feeds are targeted.
                // If opted in (false), the entire domain will be targeted. For best
                // results, set this value to false to opt in and allow URL expansions. You
                // can optionally add exclusions to limit traffic to parts of your website.
                'url_expansion_opt_out' => false,

                // Optional fields.
                'start_date' => date('Ymd', strtotime('+1 day')),
                'end_date' => date('Ymd', strtotime('+365 days'))
            ])
        ])
    ]);
}
AddPerformanceMaxCampaign.php

Python

def create_performance_max_campaign_operation(
    client,
    customer_id,
):
    """Creates a MutateOperation that creates a new Performance Max campaign.

    A temporary ID will be assigned to this campaign so that it can
    be referenced by other objects being created in the same Mutate request.

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

    Returns:
        a MutateOperation that creates a campaign.
    """
    mutate_operation = client.get_type("MutateOperation")
    campaign = mutate_operation.campaign_operation.create
    campaign.name = f"Performance Max campaign #{uuid4()}"
    # Set the campaign status as PAUSED. The campaign is the only entity in
    # the mutate request that should have its status set.
    campaign.status = client.enums.CampaignStatusEnum.PAUSED
    # All Performance Max campaigns have an advertising_channel_type of
    # PERFORMANCE_MAX. The advertising_channel_sub_type should not be set.
    campaign.advertising_channel_type = (
        client.enums.AdvertisingChannelTypeEnum.PERFORMANCE_MAX
    )
    # Bidding strategy must be set directly on the campaign.
    # Setting a portfolio bidding strategy by resource name is not supported.
    # Max Conversion and Maximize Conversion Value are the only strategies
    # supported for Performance Max campaigns.
    # An optional ROAS (Return on Advertising Spend) can be set for
    # maximize_conversion_value. The ROAS value must be specified as a ratio in
    # the API. It is calculated by dividing "total value" by "total spend".
    # For more information on Maximize Conversion Value, see the support
    # article: http://support.google.com/google-ads/answer/7684216.
    # A target_roas of 3.5 corresponds to a 350% return on ad spend.
    campaign.bidding_strategy_type = (
        client.enums.BiddingStrategyTypeEnum.MAXIMIZE_CONVERSION_VALUE
    )
    campaign.maximize_conversion_value.target_roas = 3.5

    # Set the Final URL expansion opt out. This flag is specific to
    # Performance Max campaigns. If opted out (True), only the final URLs in
    # the asset group or URLs specified in the advertiser's Google Merchant
    # Center or business data feeds are targeted.
    # If opted in (False), the entire domain will be targeted. For best
    # results, set this value to false to opt in and allow URL expansions. You
    # can optionally add exclusions to limit traffic to parts of your website.
    campaign.url_expansion_opt_out = False

    # Assign the resource name with a temporary ID.
    campaign_service = client.get_service("CampaignService")
    campaign.resource_name = campaign_service.campaign_path(
        customer_id, _PERFORMANCE_MAX_CAMPAIGN_TEMPORARY_ID
    )
    # Set the budget using the given budget resource name.
    campaign.campaign_budget = campaign_service.campaign_budget_path(
        customer_id, _BUDGET_TEMPORARY_ID
    )

    # Optional fields
    campaign.start_date = (datetime.now() + timedelta(1)).strftime("%Y%m%d")
    campaign.end_date = (datetime.now() + timedelta(365)).strftime("%Y%m%d")

    return mutate_operation
add_performance_max_campaign.py

Ruby

# Creates a MutateOperation that creates a new Performance Max campaign.
#
# A temporary ID will be assigned to this campaign so that it can
# be referenced by other objects being created in the same Mutate request.
def create_performance_max_campaign_operation(client, customer_id)
  client.operation.mutate do |m|
    m.campaign_operation = client.operation.create_resource.campaign do |c|
      c.name = "Performance Max campaign #{SecureRandom.uuid}"
      # Set the campaign status as PAUSED. The campaign is the only entity in
      # the mutate request that should have its status set.
      c.status = :PAUSED
      # All Performance Max campaigns have an advertising_channel_type of
      # PERFORMANCE_MAX. The advertising_channel_sub_type should not be set.
      c.advertising_channel_type = :PERFORMANCE_MAX
      # Bidding strategy must be set directly on the campaign.
      # Setting a portfolio bidding strategy by resource name is not supported.
      # Max Conversion and Maximize Conversion Value are the only strategies
      # supported for Performance Max campaigns.
      # An optional ROAS (Return on Advertising Spend) can be set for
      # maximize_conversion_value. The ROAS value must be specified as a ratio in
      # the API. It is calculated by dividing "total value" by "total spend".
      # For more information on Maximize Conversion Value, see the support
      # article: http://support.google.com/google-ads/answer/7684216.
      # A target_roas of 3.5 corresponds to a 350% return on ad spend.
      c.bidding_strategy_type = :MAXIMIZE_CONVERSION_VALUE
      c.maximize_conversion_value = client.resource.maximize_conversion_value do |mcv|
        mcv.target_roas = 3.5
      end
      # Set the Final URL expansion opt out. This flag is specific to
      # Performance Max campaigns. If opted out (true), only the final URLs in
      # the asset group or URLs specified in the advertiser's Google Merchant
      # Center or business data feeds are targeted.
      # If opted in (false), the entire domain will be targeted. For best
      # results, set this value to false to opt in and allow URL expansions. You
      # can optionally add exclusions to limit traffic to parts of your website.
      c.url_expansion_opt_out = false

      # Assign the resource name with a temporary ID.
      c.resource_name = client.path.campaign(customer_id, PERFORMANCE_MAX_CAMPAIGN_TEMPORARY_ID)
      # Set the budget using the given budget resource name.
      c.campaign_budget = client.path.campaign_budget(customer_id, BUDGET_TEMPORARY_ID)

      # Optional fields
      c.start_date = DateTime.parse((Date.today + 1).to_s).strftime('%Y%m%d')
      c.end_date = DateTime.parse(Date.today.next_year.to_s).strftime('%Y%m%d')
    end
  end
end
add_performance_max_campaign.rb

Perl

sub create_performance_max_campaign_operation {
  my ($customer_id) = @_;

  # Create a mutate operation that creates a campaign operation.
  return
    Google::Ads::GoogleAds::V18::Services::GoogleAdsService::MutateOperation->
    new({
      campaignOperation =>
        Google::Ads::GoogleAds::V18::Services::CampaignService::CampaignOperation
        ->new({
          create => Google::Ads::GoogleAds::V18::Resources::Campaign->new({
              # Assign the resource name with a temporary ID.
              resourceName =>
                Google::Ads::GoogleAds::V18::Utils::ResourceNames::campaign(
                $customer_id, PERFORMANCE_MAX_CAMPAIGN_TEMPORARY_ID
                ),
              name => "Performance Max campaign #" . uniqid(),
              # Set the budget using the given budget resource name.
              campaignBudget =>
                Google::Ads::GoogleAds::V18::Utils::ResourceNames::campaign_budget(
                $customer_id, BUDGET_TEMPORARY_ID
                ),
              # Set the campaign status as PAUSED. The campaign is the only entity in
              # the mutate request that should have its status set.
              status =>
                Google::Ads::GoogleAds::V18::Enums::CampaignStatusEnum::PAUSED,
              # All Performance Max campaigns have an advertisingChannelType of
              # PERFORMANCE_MAX. The advertisingChannelSubType should not be set.
              advertisingChannelType => PERFORMANCE_MAX,

              # Bidding strategy must be set directly on the campaign.
              # Setting a portfolio bidding strategy by resource name is not supported.
              # Max Conversion and Maximize Conversion Value are the only strategies
              # supported for Performance Max campaigns.
              # An optional ROAS (Return on Advertising Spend) can be set for
              # maximizeConversionValue. The ROAS value must be specified as a ratio in
              # the API. It is calculated by dividing "total value" by "total spend".
              # For more information on Maximize Conversion Value, see the support
              # article: http://support.google.com/google-ads/answer/7684216.
              # A targetRoas of 3.5 corresponds to a 350% return on ad spend.
              maximizeConversionValue =>
                Google::Ads::GoogleAds::V18::Common::MaximizeConversionValue->
                new({
                  targetRoas => 3.5
                }
                ),

              # Set the final URL expansion opt out. This flag is specific to
              # Performance Max campaigns. If opted out (true), only the final URLs in
              # the asset group or URLs specified in the advertiser's Google Merchant
              # Center or business data feeds are targeted.
              # If opted in (false), the entire domain will be targeted. For best
              # results, set this value to false to opt in and allow URL expansions. You
              # can optionally add exclusions to limit traffic to parts of your website.
              urlExpansionOptOut => "false",

              # Optional fields.
              startDate => strftime("%Y%m%d", localtime(time + 60 * 60 * 24)),
              endDate   =>
                strftime("%Y%m%d", localtime(time + 60 * 60 * 24 * 365)),
            })})});
}
add_performance_max_campaign.pl

Bidding strategy transitions

To update a campaign's bidding strategy, in a CampaignOperation.update, set the fields of the Campaign as previously described.

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Strategy status
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Cross-account bidding strategies