Starting June 17, Google began saving conversion-based user data for accounts that run enhanced conversions and customer match but never built conversion-based customer lists themselves.
Processing kicks in on August 18. If you do nothing, Google will create and populate those lists in Audience Manager for you. That sounds like free targeting power, but it’s closer to a default setting than a new capability – essentially, it’s a prompt for you to audit your conversion prompts ASAP to make sure that your tracking is clean enough to trust what Google assembles on your behalf.
TL;DR
- Google is auto-creating conversion-based customer lists for eligible accounts (enhanced conversions plus customer match) that haven't yet built them manually. Data collection started 6/17; processing starts 8/18.
- Advertisers with privacy, legal, or data governance concerns can opt out before 8/18 in settings.
- This removes a setup step. It does not give you new targeting ability you didn't already have.
- The lists are built by conversion action, so their value depends entirely on whether your conversions are segmented and valued correctly.
- Complex customer journeys may see little benefit or added noise. Treat this as a conversion audit prompt.
The Convenience Trade: What Google Is Automating and What It Isn't
Here’s where the work actually sits. These automatic lists are created by conversion action. So the value you get out of them is a direct function of how well your conversions are segmented in the first place.
For instance, a purchase and a product page visit are not the same event and should never carry the same weight. If both are tracked but neither is assigned a value that reflects reality, Google can still build a list from each of them. You'll end up with an audience segment based on a low-intent page visit sitting next to one based on an actual sale, with no meaningful difference in how they're treated. That is more lists to manage.
So before you assume these auto-built lists will sharpen your signal-based campaigns, audit the conversion setup underneath them. Confirm your primary and secondary conversions are assigned where they belong. Confirm values reflect what each action is actually worth to the business. If a sale is more valuable than a visit, the account should already know that, and your bid strategy should already reflect it. Poorly segmented conversions could now auto-populate lists that don't map to real customer value, which is a bid strategy problem waiting to happen.
The honest read: this is a good forcing function to clean up conversion tracking.
The Opt-Out Window and Who Should Actually Use It
You have until 8/18 to opt out. Here’s the exact path.
- Click the wrench icon (Tools and Settings) in the top right of Google Ads.
- Under Setup, select Account Settings.
- Scroll to the section covering conversion-based lists (it may appear under Data Sharing or a similarly labeled data settings block).
- Uncheck the box for turning on conversion-based lists, or toggle the setting off if it's already been auto-enabled for your account.
- Save the change.
Menu labels shift occasionally, so if you don't see this section immediately, check under Tools and Settings, Shared Library, Audience Manager, where the auto-generated lists themselves will also show up for review.
Not everyone needs to opt out, but some accounts should.
Privacy and legal considerations are the clearest reasons. If your organization has data governance requirements, or if adding another automated data process creates compliance friction, opting out keeps you in control. With more automation stacking up across Google Ads than ever, some advertisers will simply prefer to own that decision rather than inherit a default. That is a legitimate stance.
The opt-out is also reasonable if you'd rather build these lists deliberately once your conversion setup is clean, instead of letting Google populate them from whatever exists on 8/18. Either way, the window is finite. Make the call on purpose before the date passes.
Complex Customer Journeys and Signal-Based Campaigns, Where This Automation Falls Short
The advertisers who benefit most here have simple, well-segmented conversion setups and haven't built these lists yet. For them, this removes friction they'd otherwise handle by hand.
The picture changes for anyone with a longer or more layered customer journey. When the path to conversion involves multiple touch points and mixed intent, automatic lists built off existing conversion actions may not reflect audience segments that mean anything for your signal-based campaigns. In those accounts, the automation can be less relevant or outright unnecessary, and it may introduce noise into campaigns that were performing fine on their own logic.
If that describes your account, treat this as optional cleanup rather than a required change. Review what Google intends to build in Audience Manager before letting it apply anywhere near your bidding.
Audit Before You Automate
The takeaway is that Google just handed you a deadline to look at your conversion tracking honestly. Accounts with clean, valued, well-assigned conversions get a small convenience out of this. Accounts with sloppy conversion setups get lists that look useful and aren't. And accounts with real privacy or governance concerns get a clear window to opt out. Where you land depends on the work you should have visibility into before 8/18, not after Google starts processing.
FAQs
What are Google Ads conversion-based customer lists, and why am I being auto-enrolled?
Conversion-based customer lists are audience lists built from users who completed specific conversion actions in your account. Google began auto-creating and populating them on 6/17 for accounts that use enhanced conversions and customer match but hadn't set up these lists manually. Processing starts 8/18, and the lists appear in Audience Manager ready to apply to campaigns.
How do I opt out of conversion-based customer lists in Google Ads?
You can opt out before 8/18 by disabling conversion-based customer lists in your account settings. Advertisers with privacy requirements, legal considerations, or data governance preferences are the most likely to want this. Make the decision before the 8/18 processing date, because that is when the lists begin to populate.
Will these automatic lists improve my signal-based campaigns?
Only if your conversion actions are already segmented and valued correctly, since the lists are built by conversion action. If a purchase and a product page visit carry the same treatment in your setup, the resulting lists won't reflect real customer value. Audit your primary and secondary conversion assignments before assuming these lists will help performance.
If you're not sure your conversion actions are segmented well enough for Google to auto-build useful audience lists from them, that's exactly the kind of account review JDM can run before the 8/18 deadline.
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