Google Ads retargeting: A guide to your data segments

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One of the most profitable Google Ads targeting tactics is retargeting: showing ads to people who are already familiar with your business. But if you still think that “retargeting” means a Display campaign chasing users around the web with banner ads, you’re missing out on how “Your data segments” actually function today.

Let’s explore how you can leverage your proprietary audience data in new ways, and what mistakes to avoid in 2026 and beyond.

What are “Your data segments” in Google Ads?

Retargeting means showing ads to people who are already familiar with your business. Google uses the euphemistic name “Your data segments” to refer to all the retargeting lists in your account.

What types of retargeting can you do in Google Ads?

A variety of different retargeting methods are available in Google Ads. They mirror what you’ll find on other ad platforms like Meta, LinkedIn, or TikTok. I find it helpful to group them into four categories:

  • Website Visitors: This is the standard one — people who have visited your website. You collect this data using Google Tag Manager or Google Analytics.
  • App Users: If you have a mobile app, you can pull data from Firebase or other third-party analytics tools into Google Ads for retargeting.
  • Customer Match: This is the “holy grail” of retargeting. You take your business’s first-party data (email addresses, phone numbers, etc.) and upload it directly to Google Ads, so that Google can find those same users across its platforms.
  • Content Engagers: People who have interacted with your content on Google-owned properties. Examples include a segment of users who have watched your YouTube videos, or a segment of users who have clicked through to your site from search results (this is called the Google Engaged Audience, which we explored in another article).

Should you upload “your data segments” if you’re not planning to do retargeting?

Many practitioners overlook this detail: your data segments aren’t just about ad targeting.

Even if you don’t have a single retargeting campaign running, the mere existence of these lists in your account provides a vital signal for Smart Bidding and Optimized Targeting.

For example, when you upload a customer list, you’re telling Google, “These are the people who actually buy from me.” Even if you never add that list to your audience signal in Performance Max, Google will still use it to understand likely converters and adjust bidding/targeting accordingly.

Similarly, let’s say you only run Search and Shopping campaigns, and you use Target ROAS bidding. When Google is trying to set the right bid for the right user at the right time, their presence (or lack thereof) on a “your data segment” list is one of many signals incorporated into that bidding calculation.

How can you use retargeting lists in Google Ads?

Different campaign types handle audience data differently. It’s important to know the distinction so you can plan your targeting strategy accordingly.

  • Search, Shopping, Display: In these campaigns, you have three options with Your data segments: Targeting, Observation, Exclusion.
    • Targeting means your ads will only show if the user is a member of your data segment
    • Observation allows you to see your campaign data segmented by list, without narrowing your reach
    • Exclusion means your ads will only show if the user is NOT a member of your data segments.
  • Performance Max and App Campaigns: In these AI-powered campaigns, you can include Your data segments as part of your audience signal. Performance Max recently added the ability to exclude Your data segments as well.
  • Demand Gen: In Demand Gen, you can Target and Exclude Your data segments, but there is no “Observation” option.

If you’re new to retargeting, I find Demand Gen the best place to start. It’s built for visual storytelling and works well with the Google Engaged Audience or basic website visitor lists.

If you have some experience with retargeting campaigns, you might want to try New Customer Acquisition or Customer Retention mode in PMax or Shopping, as these are powered by Your data segments.

What’s the biggest retargeting mistake to avoid?

Over-segmenting. I know it can be tempting to create 50 different lists: “People who visited the cart on a Tuesday,” or “People who looked at three pages but didn’t click the ‘About’ section.”

Unless you’re spending six figures or more every month, this level of granularity doesn’t help, and may actually hurt your campaigns. Google’s AI needs data density to learn. When you slice your audience into tiny slivers, you don’t have enough “matched records” for the system to optimize.

Upload your unique data to Google Ads, keep your strategy simple, and let the bidding algorithms do the heavy lifting in driving returning customers for you.

This article is part of our ongoing Search Engine Land series, Everything you need to know about Google Ads in less than 3 minutes. In each edition, Jyll highlights a different Google Ads feature, and what you need to know to get the best results from it – all in a quick 3-minute read.