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private void evaluateExperiment(
    GoogleAdsClient googleAdsClient, long customerId, GoogleAdsRow row) {
  Metrics metrics = row.getMetrics();
  String experimentResourceName = row.getExperiment().getResourceName();

  // 1. Evaluate conversion success as a primary success signal if available.
  // - Point Estimate: Represents the estimated average lift or difference in conversions.
  // - Margin of Error: Outlines the confidence interval bounds. Note that the margin_of_error
  //   provided by the API is calculated for a preset confidence level which is set based on the
  //   experiment type.
  // - Lower Bound: (Point Estimate - Margin of Error). If this value is above 0,
  //   we have statistical significance that performance has improved.
  double convPValue = metrics.getConversionsAbsoluteChangePValue();
  double convLift = metrics.getConversionsAbsoluteChangePointEstimate();
  double convError = metrics.getConversionsAbsoluteChangeMarginOfError();
  double convLowerBound = convLift - convError;

  if (convPValue <= P_VALUE_THRESHOLD) {
    if (convLowerBound > 0) {
      System.out.printf(
          "Significant Success: Conversions increased. Even at the lower bound, the lift is %.2f."
              + " Promoting changes.%n",
          convLowerBound);
      promoteExperiment(googleAdsClient, customerId, experimentResourceName);
      return;
    } else if ((convLift + convError) < 0) {
      System.out.printf(
          "Significant Decline: Even the upper bound (%.2f) is below zero. Ending experiment.%n",
          convLift + convError);
      endExperiment(googleAdsClient, customerId, experimentResourceName);
      return;
    }
  }

  // 2. Fall back to evaluating click metrics if conversions are inconclusive.
  double clickPValue = metrics.getClicksPValue();
  double clickLift = metrics.getClicksPointEstimate();
  double clickError = metrics.getClicksMarginOfError();
  double clickLowerBound = clickLift - clickError;

  if (clickPValue <= P_VALUE_THRESHOLD && clickLowerBound > 0) {
    System.out.printf("Click volume is significantly up (+%.1f%%).%n", clickLift * 100);

    // Graduation is only supported for separate campaign experiments, not
    // intra-campaign experiments where there is no separate treatment campaign.
    ExperimentType experimentType = row.getExperiment().getType();
    if (experimentType != ExperimentType.ADOPT_BROAD_MATCH_KEYWORDS
        && experimentType != ExperimentType.ADOPT_AI_MAX) {
      System.out.println("Graduating treatment campaign for further manual analysis.");
      graduateExperiment(googleAdsClient, customerId, experimentResourceName);
    } else {
      System.out.println(
          "Intra-campaign trial detected: graduation is not supported. Continuing to run the"
              + " experiment to gather more conversion data.");
    }
  } else {
    // 3. Print status if no action was taken.
    System.out.printf(
        "Inconclusive: No significant lift in Conversions (p=%.2f) or Clicks (p=%.2f). Current"
            + " estimated lift: %.2f +/- %.2f. Allowing the experiment to continue running.%n",
        convPValue, clickPValue, convLift, convError);
  }
}
EvaluateAndUpdateExperiment.java
      

private static void EvaluateExperiment(GoogleAdsClient client, long customerId, GoogleAdsRow row)
{
    // This function evaluates performance metrics and immediately takes action
    // to update the experiment's status (promote, end, or graduate) if
    // statistical significance thresholds are met.
    var metrics = row.Metrics;
    string experimentResourceName = row.Experiment.ResourceName;

    bool hasConvMetrics = metrics.HasConversionsAbsoluteChangePValue
        && metrics.HasConversionsAbsoluteChangePointEstimate
        && metrics.HasConversionsAbsoluteChangeMarginOfError;

    bool hasClickMetrics = metrics.HasClicksPValue
        && metrics.HasClicksPointEstimate
        && metrics.HasClicksMarginOfError;

    // 1. Evaluate conversion success as a primary success signal if available.
    // - Point Estimate: Represents the estimated average lift or difference in conversions.
    // - Margin of Error: Outlines the confidence interval bounds. Note that the margin_of_error
    //   provided by the API is calculated for a preset confidence level which is set based on
    //   the experiment type.
    // - Lower Bound: (Point Estimate - Margin of Error). If this value is above 0,
    //   we have statistical significance that performance has improved.
    if (hasConvMetrics)
    {
        double convPValue = metrics.ConversionsAbsoluteChangePValue;
        double convLift = metrics.ConversionsAbsoluteChangePointEstimate;
        double convError = metrics.ConversionsAbsoluteChangeMarginOfError;
        double convLowerBound = convLift - convError;

        if (convPValue <= P_VALUE_THRESHOLD)
        {
            if (convLowerBound > 0)
            {
                Console.WriteLine(
                    $"Significant Success: Conversions increased. Even at the lower" +
                    $" bound, the lift is {convLowerBound:F2}. Promoting changes.");
                PromoteExperiment(client, customerId, experimentResourceName);
                return;
            }
            else if ((convLift + convError) < 0)
            {
                Console.WriteLine(
                    $"Significant Decline: Even the upper bound ({convLift + convError:F2}) " +
                    $"is below zero. Ending experiment.");
                EndExperiment(client, customerId, experimentResourceName);
                return;
            }
        }
    }

    // 2. Evaluate click volume as a secondary signal.
    // This is helpful as an early indicator or for lower-volume accounts.
    if (hasClickMetrics)
    {
        double clickPValue = metrics.ClicksPValue;
        double clickLift = metrics.ClicksPointEstimate;
        double clickError = metrics.ClicksMarginOfError;
        double clickLowerBound = clickLift - clickError;

        if (clickPValue <= P_VALUE_THRESHOLD && clickLowerBound > 0)
        {
            // We have a directional winner: high confidence in more traffic,
            // but not enough data to confirm conversion impact yet.
            Console.WriteLine(
                $"Click volume is significantly up (+{clickLift * 100:F1}%).");

            // Graduation is only supported for separate campaign experiments, not
            // intra-campaign experiments where there is no separate treatment campaign.
            if (row.Experiment.Type != ExperimentType.AdoptBroadMatchKeywords
                && row.Experiment.Type != ExperimentType.AdoptAiMax)
            {
                Console.WriteLine("Graduating treatment campaign for further manual analysis.");
                GraduateExperiment(client, customerId, experimentResourceName);
            }
            else
            {
                Console.WriteLine(
                    "Intra-campaign trial detected: graduation is not supported. " +
                    "Continuing to run the experiment to gather more conversion data.");
            }
            return;
        }
    }

    // 3. Print status if no action was taken.
    if (hasConvMetrics || hasClickMetrics)
    {
        string convStatus = hasConvMetrics
            ? $"Conversions (p={metrics.ConversionsAbsoluteChangePValue:F2}, " +
              $"lift={metrics.ConversionsAbsoluteChangePointEstimate:F2} +/- " +
              $"{metrics.ConversionsAbsoluteChangeMarginOfError:F2})"
            : "Conversions (not populated)";

        string clickStatus = hasClickMetrics
            ? $"Clicks (p={metrics.ClicksPValue:F2}, " +
              $"lift={metrics.ClicksPointEstimate:F2} +/- " +
              $"{metrics.ClicksMarginOfError:F2})"
            : "Clicks (not populated)";

        Console.WriteLine(
            $"Inconclusive: No significant action taken. {convStatus}, {clickStatus}. " +
            "Allowing the experiment to continue running.");
    }
    else
    {
        Console.WriteLine(
            "Conversion and click performance metrics are not yet populated. " +
            "Allowing the experiment to continue running.");
    }
}
EvaluateAndUpdateExperiment.cs
      

This example is not yet available in PHP; you can take a look at the other languages.
    

def evaluate_experiment(
    client: GoogleAdsClient, customer_id: str, row: GoogleAdsRow
) -> None:
    """Evaluates the performance of the experiment and updates it accordingly
    (for example, promotes, ends, or graduates).

    Checks conversion and click metrics against statistical significance thresholds
    to determine the appropriate action to take on the experiment.

    Args:
        client: an initialized GoogleAdsClient instance.
        customer_id: a client customer ID.
        row: a GoogleAdsRow containing the experiment and metrics.
    """
    # This function evaluates performance metrics and immediately takes action
    # to update the experiment's status (promote, end, or graduate) if
    # statistical significance thresholds are met.
    metrics = row.metrics
    experiment_resource_name = row.experiment.resource_name

    has_conv_metrics = (
        "conversions_absolute_change_p_value" in metrics
        and "conversions_absolute_change_point_estimate" in metrics
        and "conversions_absolute_change_margin_of_error" in metrics
    )
    has_click_metrics = (
        "clicks_p_value" in metrics
        and "clicks_point_estimate" in metrics
        and "clicks_margin_of_error" in metrics
    )

    # 1. Evaluate conversion success as a primary success signal if available.
    # - Point Estimate: Represents the estimated average lift or difference in conversions.
    # - Margin of Error: Outlines the confidence interval bounds. Note that the margin_of_error provided by the API is calculated for a preset confidence level which is set based on the experiment type.
    # - Lower Bound: (Point Estimate - Margin of Error). If this value is above 0,
    #   we have statistical significance that performance has improved.
    if has_conv_metrics:
        conv_p_value = metrics.conversions_absolute_change_p_value
        conv_lift = metrics.conversions_absolute_change_point_estimate
        conv_error = metrics.conversions_absolute_change_margin_of_error
        conv_lower_bound = conv_lift - conv_error

        if conv_p_value <= P_VALUE_THRESHOLD:
            if conv_lower_bound > 0:
                print(
                    "Significant Success: Conversions increased. Even at the lower"
                    f" bound, the lift is {conv_lower_bound:.2f}. Promoting"
                    " changes."
                )
                promote_experiment(
                    client, customer_id, experiment_resource_name
                )
                return
            elif (conv_lift + conv_error) < 0:
                print(
                    "Significant Decline: Even the upper bound"
                    f" ({conv_lift + conv_error:.2f}) is below zero. Ending"
                    " experiment."
                )
                end_experiment(client, customer_id, experiment_resource_name)
                return

        # 2. Evaluate click volume as a secondary signal.
        # This is helpful as an early indicator or for lower-volume accounts.
        click_p_value = metrics.clicks_p_value
        click_lift = metrics.clicks_point_estimate
        click_error = metrics.clicks_margin_of_error
        click_lower_bound = click_lift - click_error

        if click_p_value <= P_VALUE_THRESHOLD and click_lower_bound > 0:
            # We have a directional winner: high confidence in more traffic,
            # but not enough data to confirm conversion impact yet.
            print(f"Click volume is significantly up (+{click_lift*100:.1f}%).")

            # Graduation is only supported for separate campaign experiments, not
            # intra-campaign experiments where there is no separate treatment campaign.
            experiment_type_name = row.experiment.type_.name
            if (
                experiment_type_name != "ADOPT_BROAD_MATCH_KEYWORDS"
                and experiment_type_name != "ADOPT_AI_MAX"
            ):
                print(
                    "Graduating treatment campaign for further manual analysis."
                )
                graduate_experiment(
                    client, customer_id, experiment_resource_name
                )
            else:
                print(
                    "Intra-campaign trial detected: graduation is not supported. "
                    "Continuing to run the experiment to gather more conversion data."
                )
            return

    # 3. Print status if no action was taken.
    if has_conv_metrics or has_click_metrics:
        conv_status = (
            f"Conversions (p={metrics.conversions_absolute_change_p_value:.2f}, "
            f"lift={metrics.conversions_absolute_change_point_estimate:.2f} +/- "
            f"{metrics.conversions_absolute_change_margin_of_error:.2f})"
            if has_conv_metrics
            else "Conversions (not populated)"
        )
        click_status = (
            f"Clicks (p={metrics.clicks_p_value:.2f}, "
            f"lift={metrics.clicks_point_estimate:.2f} +/- "
            f"{metrics.clicks_margin_of_error:.2f})"
            if has_click_metrics
            else "Clicks (not populated)"
        )
        print(
            f"Inconclusive: No significant action taken. {conv_status}, {click_status}."
            " Allowing the experiment to continue running."
        )
    else:
        print(
            "Conversion and click performance metrics are not yet populated. "
            "Allowing the experiment to continue running."
        )
evaluate_and_update_experiment.py
      

def evaluate_experiment(client, customer_id, row)
  # This function evaluates performance metrics and immediately takes action
  # to update the experiment's status (promote, end, or graduate) if
  # statistical significance thresholds are met.
  metrics = row.metrics
  experiment_resource_name = row.experiment.resource_name

  has_conv_metrics = !metrics.nil? &&
                     metrics.has_conversions_absolute_change_p_value? &&
                     metrics.has_conversions_absolute_change_point_estimate? &&
                     metrics.has_conversions_absolute_change_margin_of_error?
  has_click_metrics = !metrics.nil? &&
                      metrics.has_clicks_p_value? &&
                      metrics.has_clicks_point_estimate? &&
                      metrics.has_clicks_margin_of_error?

  # 1. Evaluate conversion success as a primary success signal if available.
  # - Point Estimate: Represents the estimated average lift or difference in conversions.
  # - Margin of Error: Outlines the confidence interval bounds. Note that the margin_of_error
  #   provided by the API is calculated for a preset confidence level which is set based on the experiment type.
  # - Lower Bound: (Point Estimate - Margin of Error). If this value is above 0,
  #   we have statistical significance that performance has improved.
  if has_conv_metrics
    conv_p_value = metrics.conversions_absolute_change_p_value
    conv_lift = metrics.conversions_absolute_change_point_estimate
    conv_error = metrics.conversions_absolute_change_margin_of_error
    conv_lower_bound = conv_lift - conv_error

    if conv_p_value <= P_VALUE_THRESHOLD
      if conv_lower_bound > 0
        puts sprintf(
          "Significant Success: Conversions increased. Even at the lower " \
          "bound, the lift is %.2f. Promoting changes.",
          conv_lower_bound,
        )
        promote_experiment(client, customer_id, experiment_resource_name)
        return
      elsif (conv_lift + conv_error) < 0
        puts sprintf(
          "Significant Decline: Even the upper bound (%.2f) is below zero. " \
          "Ending experiment.",
          conv_lift + conv_error,
        )
        end_experiment(client, customer_id, experiment_resource_name)
        return
      end
    end
  end

  # 2. Evaluate click volume as a secondary signal.
  # This is helpful as an early indicator or for lower-volume accounts.
  if has_click_metrics
    click_p_value = metrics.clicks_p_value
    click_lift = metrics.clicks_point_estimate
    click_error = metrics.clicks_margin_of_error
    click_lower_bound = click_lift - click_error

    if click_p_value <= P_VALUE_THRESHOLD && click_lower_bound > 0
      # We have a directional winner: high confidence in more traffic,
      # but not enough data to confirm conversion impact yet.
      puts sprintf("Click volume is significantly up (+%.1f%%).", click_lift * 100)

      # Graduation is only supported for separate campaign experiments, not
      # intra-campaign experiments where there is no separate treatment campaign.
      experiment_type = row.experiment.type
      if experiment_type != :ADOPT_BROAD_MATCH_KEYWORDS && experiment_type != :ADOPT_AI_MAX
        puts "Graduating treatment campaign for further manual analysis."
        graduate_experiment(client, customer_id, experiment_resource_name)
      else
        puts "Intra-campaign trial detected: graduation is not supported. " \
             "Continuing to run the experiment to gather more conversion data."
      end
      return
    end
  end

  # 3. Print status if no action was taken.
  if has_conv_metrics || has_click_metrics
    conv_status = if has_conv_metrics
      sprintf(
        "Conversions (p=%.2f, lift=%.2f +/- %.2f)",
        metrics.conversions_absolute_change_p_value,
        metrics.conversions_absolute_change_point_estimate,
        metrics.conversions_absolute_change_margin_of_error,
      )
    else
      "Conversions (not populated)"
    end

    click_status = if has_click_metrics
      sprintf(
        "Clicks (p=%.2f, lift=%.2f +/- %.2f)",
        metrics.clicks_p_value,
        metrics.clicks_point_estimate,
        metrics.clicks_margin_of_error,
      )
    else
      "Clicks (not populated)"
    end

    puts "Inconclusive: No significant action taken. #{conv_status}, #{click_status}. " \
         "Allowing the experiment to continue running."
  else
    puts "Conversion and click performance metrics are not yet populated. " \
         "Allowing the experiment to continue running."
  end
end
evaluate_and_update_experiment.rb
      

This example is not yet available in Perl; you can take a look at the other languages.