How Enhanced Conversions Works in Google Ads (And How to Set It Up Right)

The Take: Enhanced Conversions is not a feature you flip on and forget. It is the difference between Google's bidding algorithm working from a full picture of your customers and working from a shrinking fraction of one, and most Australian advertisers still have it half-configured.

Enhanced Conversions is a Google Ads feature that sends hashed first-party customer data, such as an email address, back to Google alongside a normal conversion tag, so Smart Bidding can still match a sale to the ad that caused it once the tracking cookie is gone.

As cookie loss and browser privacy restrictions strip away signal, Enhanced Conversions gives Smart Bidding a second, privacy-safe way to match a conversion to the ad click that caused it.

Google has now unified the setup into a single account-level toggle covering both website conversions and offline lead conversions, replacing what used to be two separate configurations with different implementation paths (Google tag, Google Tag Manager or the Conversions API). If your account predates the change, you were likely running one type and not the other, which is a measurement gap you should close.

Enhanced Conversions works in three steps. A customer converts on your site or submits a lead form. The system captures first-party data your business already collects, things like email, name, phone number and address. That data is hashed locally using the SHA256 algorithm before it ever leaves your server or browser, then sent to Google alongside the standard conversion event.

Google compares the hash against its own signed-in user data. A match means the conversion gets attributed to the correct ad interaction even if the original click-through cookie was blocked, expired or never set. No match means nothing changes. You lose nothing by turning it on and you do not expose raw customer data at any point, because the hashing happens before transmission.

The underlying mechanics, the hashing, the matching, the consent requirements, did not change. What changed is that you can no longer accidentally run one type without the other. For advertisers who set up Enhanced Conversions years ago and never revisited it, this is the prompt to check.

Confirm you have a compliant privacy policy that discloses you share customer data with Google for advertising measurement.

Set up Google Consent Mode so Enhanced Conversions only fires for users who have consented to tracking.

Choose your data source: Google tag on your site, Google Tag Manager or the Google Ads API for offline lead uploads.

Map the specific fields your conversion event will pass through: email, phone, name and address.

Turn on the single Enhanced Conversions toggle at account level in Google Ads under Conversions settings.

Check the diagnostics panel in Google Ads a few days later to confirm your match rate is populating, not sitting at zero.

Most Australian advertisers get steps one through four right and then never check step six. A toggle that is switched on but silently failing to match is worse than knowing it is off, because you assume the data gap is closed when it is not. In New Rebellion's own audit work across Australian small and mid-sized businesses, under-tracking is one of the most common gaps found, and a badly wired Enhanced Conversions setup is a frequent culprit.

No, and this is the most common confusion. Consent Mode governs whether tracking is allowed to fire at all, based on what the user agreed to. Enhanced Conversions improves the quality of the signal for users you are already permitted to measure. You need both, configured to work together, not one instead of the other.

Nothing breaks visibly, which is exactly the trap. Campaigns keep running and the dashboard looks normal. What actually happens is the share of conversions Google can confidently attribute quietly shrinks as cookies degrade further, and Smart Bidding optimises against a smaller, noisier sample. You do not get an alert. You get slowly worse bidding decisions with no obvious cause, until someone finally checks the match rate.

Methodology note: the setup steps and table above are drawn directly from Google's own Ads Help documentation, current as of July 2026, cross-checked against New Rebellion's own client implementations. Google Ads features change on its own schedule, so always confirm current behaviour against the linked source before a large account migration.

How to check your own setup: most audits we run start by comparing what a business thinks is tracked against what a scan actually finds connected, checking consent configuration, tag coverage and match rate health as three separate signals rather than one pass or fail. Enhanced Conversions is one of the fields checked every time. For Australian businesses weighing up broader measurement gaps, a properly configured NR Studio connection will surface where your tracking stack has holes, Enhanced Conversions included, against your industry benchmark.

Should I turn on Enhanced Conversions?

For almost every advertiser running conversion-based bidding, yes. The upside is better bid signal with no cost. The only real prerequisite is making sure your consent and privacy settings are compliant before you flip it on, so check that first rather than after.

Is Enhanced Conversions the same as offline conversion tracking?

No. Offline conversion tracking uploads conversions that happened outside your website, like a phone sale or an in-store purchase, back into Google Ads. Enhanced Conversions can apply to both website and offline (lead) conversions, but it is specifically about improving match accuracy using hashed first-party data, not about the upload mechanism itself.

Do I need a developer to set up Enhanced Conversions?

For the Google Tag Manager path, most marketers can configure it without a developer if they already have GTM installed correctly. Server-side implementation through the Conversions API generally needs technical support. Start with GTM if that is already your setup.

How do I know if Enhanced Conversions is actually working?

Check the diagnostics section under your Enhanced Conversions settings in Google Ads. It shows a match rate and flags common implementation errors. If the match rate is at or near zero more than a week after setup, the tag is not passing data correctly and needs troubleshooting, not patience.