Google Expands Conversion Lift to Search and Performance Max Campaigns

Google Ads is expanding access to Conversion Lift, a tool that measures the incremental conversions generated by advertising. Eligible advertisers can now launch studies independently for Search and Performance Max campaigns without having to contact a Google representative.

This update expands the options available for evaluating paid advertising performance and helps advertisers better understand its actual contribution to business results. Rather than relying exclusively on attribution models, advertisers can measure how many conversions were genuinely generated by advertising.

What’s Changing in Conversion Lift

Previously, advertisers who wanted to conduct Conversion Lift studies for Search and Performance Max campaigns had to contact a Google representative to obtain access.

These campaign types are now included among those supported by user-based Conversion Lift studies. Other supported campaign types include Display, Video, Demand Gen, and App campaigns.

However, self-service access is not available to every advertiser. To launch a study, advertisers must meet specific requirements regarding conversion volume, campaign budgets, and conversion tracking configuration.

What Is Conversion Lift and How Does It Work?

Conversion Lift is a Google Ads tool that measures the incremental conversions attributable to advertising. It helps determine whether a campaign genuinely encourages users to take desired actions or simply receives credit for conversions under the configured attribution model.

To conduct a study, Google creates two groups of users:

• Test group: Users who can be exposed to the advertising campaigns being measured.
• Control group: Users who are not exposed to the ads included in the study.

Google then compares the behavior of the two groups and measures the difference in conversion volume. This difference helps estimate the incremental results associated with advertising.

For example, a user might make a purchase after seeing an ad. However, the sequence of events alone does not prove that the ad caused the purchase. The user may already have been familiar with the brand, intended to purchase the product, or discovered it through another channel.

Conversion Lift helps evaluate how the behavior of users who could see the ads differs from that of the control group. This provides a better understanding of advertising’s incremental contribution rather than simply recording the conversions attributed to a campaign.

Google also notes that increasing the size of the control group can improve the study sample. However, this means that more users will not see the ads during the experiment. Advertisers should therefore consider the trade-off between measurement quality and potential advertising opportunities when planning a study.

What Are the Requirements for Launching a Study?

Self-service access to Conversion Lift comes with several restrictions. To launch a study for Search or Performance Max, advertisers must meet the following requirements:

• At least 1,000 observed conversions. Conversions using supplementary data are excluded from this threshold.
• A minimum campaign budget of $5,000. Campaigns participating in the study must meet the applicable budget requirement.
• At least one compatible conversion action. The Google Ads account must track at least one conversion action supported by Conversion Lift.

Before launching a study, advertisers should review their conversion tracking configuration, verify that data is being collected correctly, and determine which specific actions they want to evaluate.

It is important to note that meeting these requirements does not guarantee that the tool will be available in a particular account. According to Google, Conversion Lift availability varies by account. Campaigns in alpha or beta testing may also require assistance from a Google representative.

What Results Can Advertisers Measure With Conversion Lift?

Conversion Lift studies can evaluate the impact of advertising on various desired actions, including:

• Purchases.
• Lead generation.
• Website activity.
• Other eligible conversion actions.

The choice of conversion action directly affects the usefulness of the study results. Google recommends selecting conversion actions that occur frequently enough to produce statistically meaningful findings.

For example, if a company tracks only rare conversion events, there may not be enough observations to reliably compare the test and control groups. In such cases, interpreting the results becomes more difficult.

Before conducting a study, advertisers should therefore identify the metrics that best reflect their business objectives and verify that sufficient data is available to evaluate them.

Why This Update Matters for Search and Performance Max

Expanded access to Conversion Lift is particularly relevant for advertisers investing substantial budgets in paid search and Performance Max campaigns.

Measuring the Effectiveness of Branded Search Campaigns

Users searching for a company name or its products are often already familiar with the brand and may intend to make a purchase. In these cases, a campaign can receive credit for conversions that would have occurred even without the ad.

Conversion Lift helps advertisers evaluate whether branded search advertising generates additional results rather than simply capturing existing demand.

This is particularly important when assessing the value of investing in branded search terms and deciding how to allocate advertising budgets.

Measuring the Incremental Value of Performance Max

Performance Max uses automation to distribute ads across multiple Google channels and properties. As a result, evaluating the campaign’s actual contribution can be more challenging: standard reports do not always clearly show how much the campaign has increased total conversion volume.

Conversion Lift helps advertisers measure a campaign’s incremental impact at the user level. This provides additional evidence for making budget allocation and optimization decisions.

However, study results should not be considered in isolation. A comprehensive performance assessment should also account for customer acquisition costs, revenue, profitability, and the results generated by other marketing channels.

How Incrementality Measurement Differs From Attribution

Traditional attribution models distribute credit for a conversion across advertising interactions according to a selected model. However, they do not always answer the question of whether the conversion would have occurred without advertising.

Conversion Lift takes a different approach: it compares the results of groups of users who were and were not exposed to the advertising being measured.

These approaches do not replace one another; they complement each other. Attribution helps advertisers analyze the customer journey leading to a conversion, while incrementality studies help estimate the additional results associated with advertising.

This distinction is particularly important as automation becomes more prevalent. When campaigns automatically optimize bids, audiences, and ad delivery across different properties, advertisers need to do more than track recorded conversions. They also need to determine whether advertising genuinely increases the number of desired actions.

How Advertisers Can Use the New Capabilities

To get practical value from Conversion Lift, advertisers should begin by checking data quality and defining the objectives of their studies.

1. Check tool availability. Verify that your Google Ads account meets the requirements and has access to Conversion Lift.
2. Review conversion tracking. Ensure that purchases, leads, and other important business actions are tracked correctly.
3. Define the study objective. Determine which advertising impact you want to measure, such as additional purchases generated by branded search or incremental conversions from Performance Max.
4. Make sure sufficient data is available. Select conversion actions that occur frequently enough to produce statistically useful results.
5. Use the findings to guide decisions. Compare the results with advertising costs, revenue, lead quality, and overall business metrics before changing budget allocation.

Conclusion

Expanding Conversion Lift access to Search and Performance Max is an important step in the development of advertising measurement tools in Google Ads. Advertisers who meet the requirements can now conduct incrementality studies independently, without necessarily involving a Google representative.

The main benefit of this update is the ability to better distinguish conversions that advertising genuinely helped generate from those that might have occurred regardless of advertising exposure.

For Search campaigns, this can be useful when evaluating the effectiveness of branded advertising. For Performance Max, it provides an additional way to assess the incremental value of automated campaigns.

However, Conversion Lift does not replace a comprehensive marketing analytics system. It delivers the most value when combined with accurate conversion tracking, analysis of customer quality, and an assessment of financial results.

To make advertising budgets more effective, businesses need to do more than track conversions in advertising dashboards. They must also regularly evaluate the additional value those conversions generate for the business.

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