Enhanced Conversions in Google Ads: What They Are and How to Set Them Up
What enhanced conversions actually do, what customer data they use, and how to set them up through the Google tag or Google Tag Manager.
Enhanced conversions is a Google Ads feature that improves the accuracy of conversion measurement by sending hashed first-party customer data — like an email address or phone number — alongside a standard conversion.
It doesn’t replace existing conversion tracking; it supplements it, filling in matches that cookie-based tracking alone increasingly misses.
In practice, setting it up means capturing a customer data field already present on the page — usually an email address at checkout or on a lead form — hashing it with SHA256 in the browser before it ever leaves the page, and sending that hashed value alongside the existing conversion tag, through the Google tag directly or through Google Tag Manager, both of which Google documents as supported paths.
Key Takeaways
- Enhanced conversions doesn’t replace standard conversion tracking — it supplements it by sending hashed first-party customer data (email, name, address, phone) that helps Google match conversions to signed-in Google accounts when a cookie-based match alone would miss.
- The customer data is hashed with SHA256 in the browser before it’s sent — Google’s own documentation is explicit that raw customer data is never transmitted, only the one-way hash.
- Google documents two setup paths: through the Google tag directly, or through Google Tag Manager — the GTM path still requires real configuration work and, per Google’s own guidance, coordination with a developer, not a trivial toggle.
- Enhanced conversions for leads (form submissions, phone leads) and for web (purchases, sign-ups) have historically been separate settings; Google has been moving toward consolidating them into a single account-level setting.
- This is a data-quality improvement, not a new conversion action — it doesn’t create a new goal to track, it makes the matching on existing conversions more accurate.
What Enhanced Conversions Actually Does
Standard conversion tracking relies heavily on cookies and click identifiers to connect an ad click to a later conversion — a connection that’s gotten less reliable as browsers restrict third-party cookies and users clear their data more often. Enhanced conversions adds a second signal: first-party customer data collected directly on the advertiser’s own site at the moment of conversion, which Google can match against signed-in Google account data to recover conversions the cookie-based match alone would have missed.
What Data It Uses — and What It Doesn’t Send
The feature works with first-party fields the site already collects as part of a purchase or lead form — email address, name, home address, and phone number. Before any of it leaves the browser, it’s run through SHA256, a one-way hashing algorithm; Google’s documentation is explicit that the hashed value is what’s sent, not the original data, and hashing can’t be reversed to recover it.
Two Ways to Set It Up
Through the Google Tag
If the site already uses the Google tag directly for conversion tracking, enhanced conversions is configured as an extension of that same tag — pointing it at the customer data fields already present on the confirmation or lead-form page.
Through Google Tag Manager
If tracking already runs through GTM, Google documents configuring enhanced conversions via a Google tag deployed in that same container. Google’s own setup guide is explicit that this requires understanding how conversion tracking is currently configured on the site and may involve real code changes — it recommends having a developer available, not treating it as a quick settings change.
Enhanced Conversions for Web vs. for Leads
"For web" covers conversions captured directly on the site — purchases, sign-ups, completed forms. "For leads" covers a related but distinct case: leads that convert into a sale later, offline, matched back using data like an email address submitted at lead-capture time. Google has been working to combine these into a single on/off setting at the account level rather than two separate configurations, so it’s worth checking current account settings rather than assuming they’re still split.
Common Setup Mistakes
Enhanced Conversions Setup Checklist
- Confirm which customer data fields are actually present on the confirmation/lead page before configuring — enhanced conversions can only use data that’s genuinely there.
- Verify hashing is happening correctly (SHA256, in the browser) rather than assuming the tag handles it automatically without checking.
- Check whether the account already has enhanced conversions for leads and for web as separate settings or consolidated, rather than configuring against outdated documentation or screenshots.
- Test with a real conversion and confirm match status in the Google Ads diagnostics before assuming the setup is working.
- Loop in a developer for the Google Tag Manager path — Google’s own guidance treats this as a real implementation, not a toggle.
Where This Fits With the Rest of Conversion Tracking
Enhanced conversions assumes standard conversion tracking is already working correctly — it improves matching on conversions that are already firing, it doesn’t fix a conversion tag that isn’t set up right in the first place. If that foundation isn’t solid yet, start with how to set up Google Ads conversion tracking with Google Tag Manager before adding enhanced conversions on top of it.
Frequently Asked Questions
Does enhanced conversions replace my existing conversion tracking?
No — it supplements it. Standard conversion tracking still runs; enhanced conversions adds hashed first-party customer data that helps match conversions Google might otherwise miss.
Is customer data sent to Google in plain text?
No. The data is hashed with SHA256 in the browser before it’s sent — Google’s documentation states the hashed value is what’s transmitted, not the original customer data.
Which setup method should I use — the Google tag or Google Tag Manager?
Whichever matches how conversion tracking is already configured on the site. If tracking already runs through GTM, Google documents configuring enhanced conversions there directly rather than switching to a separate Google tag implementation.
Is setting this up through Google Tag Manager quick and simple?
Not necessarily — Google’s own setup guide recommends having a developer available, since it requires understanding the existing conversion tracking configuration and may involve real code changes.
What’s the difference between enhanced conversions for web and for leads?
For web covers conversions captured directly on the site, like purchases or completed sign-ups. For leads covers leads that convert offline later, matched using data submitted at lead-capture time. Google has been consolidating these into a single account-level setting.
Does enhanced conversions create a new conversion action I need to track?
No — it’s a data-quality improvement on existing conversion actions, not a new goal. It doesn’t add anything to track; it makes the matching on what’s already being tracked more accurate.
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Sources and Further Reading
What enhanced conversions is and what data it uses: Google Ads Help — About Enhanced Conversions. Setup via Google Tag Manager: Google Ads Help — Set Up Enhanced Conversions for Web Using Google Tag Manager.
Written by
Rafael Arceo
Rafael Arceo is a digital marketing and web technology specialist focused on Google Ads conversion tracking, GTM, GA4, SEO, WordPress, Payload CMS, and website conversion setup.
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