Standard conversion tracking can miss sales and leads, and missing data weakens your bidding. Google Ads enhanced conversions add a layer of hashed customer data to your existing tracking so Google can match more conversions to ad interactions. This guide explains how the feature works, the two types and how to set it up with care.
In this guide: What Enhanced Conversions Are | How Google Ads Enhanced Conversions Work | The Two Types | What to Prepare Before Setup | If You Hash the Data Yourself | Why It Helps Bidding | Common Setup Problems | How to Check It Is Working | Frequently Asked Questions | Final Thoughts
What Enhanced Conversions Are
Google’s help page on enhanced conversions describes the feature as a way to make conversion measurement more accurate and support stronger bidding. It supplements your current conversion tracking and does not replace it, so your tags and conversion actions stay in place.
Without a solid base, there is nothing to enhance. If your setup is incomplete, start with our guide to tracking conversions in Google Ads.
How Google Ads Enhanced Conversions Work
When someone converts, your website tag or an imported offline event sends first-party data to Google. This can include an email address, name, home address or phone number. The data is hashed with SHA256, a one-way algorithm, before it is sent.
Google then compares the hashed values with signed-in Google accounts that engaged with your ads. When there is a match, the conversion is credited to that ad interaction. Google states that it only reports privacy-safe conversions.
The Two Types
Enhanced conversions for web
This type is for sales and other events that happen on your website. It improves online measurement by matching hashed customer details from the conversion page to signed-in Google accounts.
Enhanced conversions for leads
This type is for sales that happen offline after a website lead, such as a property inquiry that turns into a signed lease later. It combines hashed lead details with imported offline conversions. Our guide to offline conversion import covers the import side of that process.
What to Prepare Before Setup
A little planning saves you from messy data later. Work through this list before you turn the feature on.
- Confirm which conversions matter. Decide whether your key outcomes happen on your site, offline or both. That tells you which type you need.
- Find the data source. Identify where customer details appear, such as a checkout form or a lead form, and make sure the fields are captured at the moment of conversion.
- Check your consent and privacy position. You are responsible for collecting customer data lawfully and for following Google’s customer data policies. Speak to your legal adviser if you are unsure.
- Plan how you will send the data. You can use website tags or imported offline events, and each type has its own setup guide in the help centre.
If You Hash the Data Yourself
Some advertisers prefer to normalize and hash the data before it leaves their systems. Google’s page lists the steps to follow:
- Remove leading and trailing whitespace.
- Convert text to lowercase.
- Format phone numbers to the E.164 standard.
- Remove periods before the domain in gmail.com and googlemail.com addresses.
- Hash the result using hex SHA256.
Small formatting errors cause failed matches, so test with a few records before you send a full set.
Why It Helps Bidding
Smart Bidding learns from the conversions it can see. If more of your real conversions are reported, the system has a fuller picture of which searches and audiences lead to results. That is the main reason to turn the feature on.
It also pairs well with value data. If your conversions carry different values, you can adjust them with conversion value rules, so the improved matching feeds into smarter bids.
Common Setup Problems
Most issues come from the data and not from the feature itself. Watch for these.
- Form fields that are empty or hidden at the time the tag fires, so no customer details are available to send.
- Email addresses with extra spaces or capital letters when you hash the data yourself.
- Phone numbers that are not in the E.164 format, which Google lists as a required step.
- Data collected on a page that the tag cannot read, such as details entered on a later screen.
Fix these at the source, and keep a short note of what you changed and when, so you can link any shift in reporting to the right cause.
How to Check It Is Working
After setup, review the status shown for the conversion action in your account and look for diagnostics or warnings. Compare reported conversions before and after the change over a similar period, but allow for normal swings in demand. Give the data time to build before you draw conclusions, and avoid changing bids and targets at the same time, so you can tell what made the difference.
Frequently Asked Questions
Do enhanced conversions replace my conversion tag?
No. Google describes them as a supplement to your existing conversion tracking, so keep your current tags and conversion actions.
Is the customer data sent in plain text?
No. Data such as email addresses is hashed with SHA256 before it is sent to Google, whether a tag does it or you do it yourself.
Which type do I need for lead generation?
If leads turn into sales offline, enhanced conversions for leads is the match, because it combines hashed lead data with imported offline conversions.
Final Thoughts
Google Ads enhanced conversions give your bidding more reliable data without changing the tags you already use. Choose the right type for your funnel, prepare clean customer data and respect privacy rules from the start. Then check the results over a fair time window.
Want expert help with your account? See our Google Ads management service.