What Are Enhanced Conversions? Setup and the Mechanism That Improves Measurement Accuracy

Even after installing a conversion tag in Google Ads, you may not be able to measure all of your actual results. Due to browser restrictions and changes in how cookies are handled, conventional measurement misses some conversions. What complements this and improves measurement accuracy is enhanced conversions. This article explains the mechanism and setup of enhanced conversions (for web), along with their relationship to the basic conversion tag, in a way understandable even for first-timers.

Note that the installation steps for the basic conversion tag itself are covered in a separate article. This article, premised on that installation being complete, focuses on enhanced conversions, which further improve measurement accuracy.

What Are Enhanced Conversions

Enhanced conversions is a feature that complements the existing conversion tag and improves the accuracy of conversion measurement. It supplements results that the conventional tag alone couldn't fully measure, allowing you to obtain more accurate conversion data. This improves not only the accuracy of reports but also the quality of automated bidding optimization.

Enhanced conversions come in two kinds: "for web," which targets results on the website, and "enhanced conversions for leads," which targets lead acquisition such as form submissions. This article focuses on the for-web version, which is the basic one for many sites.

The Mechanism That Improves Measurement Accuracy

Understanding the mechanism of why enhanced conversions can improve measurement accuracy makes the meaning of the setup easier to grasp. The key is the safe use of first-party data.

Hashing First-Party Data Before Sending

Enhanced conversions uses first-party data obtained on your own site—for example, an email address entered at the time of conversion. Before being sent to Google, this information is converted into an unreadable form by a secure one-way hashing process called SHA256. Because the original data is not sent as-is, you can supplement measurement in a way that is considerate of privacy.

Matching with Login Information to Link Results

The sent hash data is matched against the information of the Google account the user was logged into. This more reliably links ad events—such as ad clicks and views—with conversions that occurred on the site. Being able to capture results that the conventional tag alone couldn't link is the reason for the accuracy improvement.

How to Set Up Enhanced Conversions

Enhanced conversions can be set up in several ways. Choose according to your implementation environment. The premise is that the basic conversion tag is correctly installed.

Choose the Unit for Enabling

Enhanced conversions can be enabled all at once at the account level, or enabled for a specific conversion action. Enabling at the account level reduces the steps involved in setup, making it convenient when you want to apply it collectively. First, decide at what scope to enable it.

Choose the Implementation Method

For implementing the setup, there are methods using the Google tag, using Google Tag Manager, and using the Google Ads API. If you have already introduced the Google tag or Tag Manager on your site, you can use it to set up manually. It's a good idea to choose according to your operating structure and the tools you already use.

Set Up the Passing of Data

Once you've chosen the implementation method, configure the setting to pass the first-party data obtained at the time of conversion to enhanced conversions. For example, you specify the email address entered in the form as the target to be hashed and sent. Correctly setting which data to obtain from where is the key to gaining the accuracy-improvement effect.

What to Check After Setup

Once setup is complete, verify that it is functioning correctly. Don't leave it just because you've set it up; it's important to check that the data is being sent appropriately.

In the Google Ads dashboard, you can check the diagnostic information and status of enhanced conversions. Look at whether the data is being received correctly and whether any warnings are appearing, and review the settings if there is a problem. Reflection can take time, so it's reassuring to check the status not just right after setup but also after some time has passed.

About the 2026 Settings Consolidation

Regarding enhanced conversions, changes to the settings are progressing in 2026. This is a point worth grasping whether you are setting up from now on or already using them.

Since April 2026, Google Ads has become able to receive user-provided data simultaneously from website tags, data manager, and API connections, so there is no longer a need to narrow the implementation method to one. Furthermore, enhanced conversions (for web) and enhanced conversions for leads are being consolidated into a single, easy-to-toggle setting. Because existing users are automatically migrated to the new consolidated setting, there is basically no action needed if you are already using it. Since the latest specifications can change, we recommend checking the current steps in the Google Ads Help when setting up.

Summary

Enhanced conversions is a feature that complements the basic conversion tag, reducing measurement misses and improving accuracy. By safely hashing first-party data and sending it, then matching it with login information, you become able to capture results that couldn't previously be linked. Setup proceeds in the flow of choosing the unit for enabling and the implementation method, then configuring the passing of data. Once your basic conversion measurement is in order, introduce enhanced conversions as the next step, and aim for ad operations based on more accurate data.