How To Set Up Enhanced Conversions In Google Ads

If you are running Google Ads and you are not using enhanced conversions, there is a very real chance that your conversion data is incomplete, and that means your campaigns are being optimised on shaky foundations. Enhanced conversions are one of the most impactful improvements Google has made to its tracking capabilities in recent years, and yet a surprising number of advertisers are either unaware of them or have simply not got around to setting them up. This guide walks you through exactly how to set up enhanced conversions in Google Ads, why they matter, and what you need to have in place before you begin.

What Are Enhanced Conversions?

Enhanced conversions are a feature within Google Ads that improves the accuracy of your conversion measurement by supplementing your existing conversion tags with hashed first-party data. When a user converts on your website, for example by completing a purchase or submitting a contact form, data such as their email address or phone number is captured, hashed using a secure SHA-256 algorithm, and then sent to Google to match against signed-in Google accounts. This allows Google to attribute conversions that might otherwise be lost due to cookie restrictions, browser privacy updates, or ad blockers.

As third-party cookies continue to be phased out across the web, first-party data has become significantly more valuable. Enhanced conversions sit at the heart of a privacy-safe approach to conversion tracking, and they are Google's recommended solution for maintaining measurement accuracy in this changing landscape. You can read more about the technical background directly on the Google Ads Help Centre.

Why This Matters For Your Campaigns

Conversion data is the fuel that powers smart bidding strategies like Target CPA and Target ROAS. If your conversion tracking is under-reporting, Google's algorithm is effectively working with less information than it needs, and that directly impacts how well it can optimise your bids and placements. Think of it like trying to navigate using a map with half the roads missing. You might still reach your destination, but the journey will be far less efficient than it should be.

Enhanced conversions help close that gap. By recovering conversions that would otherwise go unmeasured, you give Google's machine learning more accurate signals to work with, which in turn leads to smarter decisions about who to show your ads to and at what price. For any advertiser relying on performance-based bidding, this is not an optional enhancement, it is a genuinely important part of how your account should be configured.

Before You Begin

There are a few things you need to have in place before setting up enhanced conversions. First, you must already have Google Ads conversion tracking set up on your website. Enhanced conversions build on top of your existing conversion tags, so if you have not yet configured standard conversion tracking, that needs to happen first. Second, you will need access to your website to make changes, either directly or through a tag management solution such as Google Tag Manager. Third, you need to ensure your privacy policy is up to date and discloses to users that their data may be used for advertising measurement purposes, as this is a requirement of using this feature.

How To Set Up Enhanced Conversions In Google Ads

There are three implementation methods available: using Google Tag Manager, using the Google tag directly on your site, or using the Google Ads API for more technical setups. For most advertisers, the Google Tag Manager route offers the best balance of control and simplicity, and that is the method we will focus on here.

Step One: Enable Enhanced Conversions In Your Google Ads Account

Log into your Google Ads account and navigate to the Tools and Settings menu. Under the Measurement section, select Conversions. Click into the specific conversion action you want to enhance, then click Edit Settings. You will find an option to turn on enhanced conversions. Accept the customer data terms when prompted, and save your changes. You will also be asked to select your implementation method at this point, so choose Google Tag Manager.

Step Two: Configure Your Tag In Google Tag Manager

Open your Google Tag Manager account and navigate to the container connected to your website. You are going to create a new tag. Select the Google Ads Conversion Tracking tag type, and link it to the relevant conversion action in your account. Within the tag configuration, you will see an option to include user-provided data. Enable this, and then either create a new User-Provided Data variable or configure an existing one to capture the relevant customer data fields.

The data fields you can include are email address, phone number, first name, last name, home address including street, city, region, postcode, and country. You do not need to include all of these; email address alone is often sufficient and is the most commonly matched field. The key is that this data must come from the conversion page itself, for example the thank you page after a form submission or order confirmation page after a purchase, where the user has already provided their details voluntarily.

Step Three: Map The Data Variables Correctly

This is the step where accuracy really matters. You need to create Data Layer variables or DOM scraping variables in Google Tag Manager that pull the correct user data from your confirmation page. If your website already pushes order data into the data layer, this process becomes considerably more straightforward. If not, you may need to work with your web developer to ensure the relevant data is being passed correctly. The variable you create should capture the raw data, as Google Tag Manager will handle the hashing automatically before it is sent to Google.

Step Four: Test And Verify

Before publishing your container, use Google Tag Manager's Preview mode to test the implementation. Walk through a conversion journey on your site, and check that the tag is firing correctly on the confirmation page, and that the user-provided data variable is populating with the expected values. You can also use the Google Tag Assistant Chrome extension to verify that your tags are working as intended. Once you are satisfied that everything is configured correctly, publish your changes.

Back in Google Ads, you can check the status of your enhanced conversions implementation by returning to the Conversions section. After a short period of data collection, you should see a status indicator confirming that enhanced conversions are active and functioning.

Common Issues To Watch For

One of the most frequent problems advertisers encounter is that the user-provided data variable returns empty or null values because the data is not available on the page when the tag fires. This can happen if your confirmation page loads the user data asynchronously after the initial page render. In these cases, you may need to adjust your tag firing trigger to wait until the data is available, or work with your development team to push the data into the data layer at the right moment.

Another issue worth being aware of is consent. If you are operating under a consent management framework, which is particularly important in the UK and across Europe given the requirements of UK GDPR, you need to ensure that enhanced conversion data is only collected from users who have consented to marketing and measurement cookies. Configuring consent mode correctly alongside enhanced conversions is strongly recommended, and Google's documentation on consent mode provides clear guidance on how to do this.

Making The Most Of Your Enhanced Conversion Data

Once enhanced conversions are live and verified, it is worth reviewing your conversion data over the following weeks to understand the impact. You may find that previously untracked conversions begin to appear, and that your overall conversion numbers increase as a result. This is not additional conversions being generated; it is existing conversions being correctly attributed for the first time.

With more complete data feeding into your smart bidding strategies, you are in a much stronger position to make informed decisions about budget allocation, bid targets, and campaign performance. Enhanced conversions are not a set-and-forget feature, but once the implementation is solid, they require very little ongoing maintenance whilst continuing to deliver meaningful improvements to your measurement accuracy.

A More Accurate Picture Leads To Better Decisions

Setting up enhanced conversions in Google Ads is one of those foundational tasks that pays dividends across the entire life of your account. It is not glamorous work, and it sits in the background once done, but the difference between running campaigns with complete conversion data and running them with partial data is significant. If you are serious about getting the most from your Google Ads investment, taking the time to implement enhanced conversions properly is one of the most valuable things you can do for your account right now.