Remarketing is one of the most powerful tools in Google Ads. It allows you to reconnect with people who have already shown interest in your business, whether they visited your site, watched a video, or used your app. Instead of reaching cold traffic, you’re targeting people who are already familiar with your brand, which often leads to lower costs and higher conversions.
But in 2025, creating remarketing audiences is a little more complex than just adding a code snippet to your website. Between Google’s updated tools, list-size requirements, and privacy rules, you need a clear process to set it up correctly.
This guide will walk you through how to create remarketing audiences in Google Ads step by step. We’ll cover the two main methods (direct in Google Ads and via GA4), explain eligibility thresholds, and share practical tips for troubleshooting and optimizing your audiences.
Why Remarketing Audiences Matter
Remarketing is about timing and relevance. Someone who visited your pricing page yesterday is far more likely to convert than someone who has never heard of you. By building remarketing lists, you can:
- Re-engage warm leads.
- Nudge visitors who abandoned checkout.
- Cross-sell or upsell to past customers.
- Exclude converters to avoid wasting budget.
Done right, remarketing allows you to move people further down the funnel and make your ad spend more efficient.
Prerequisites Before You Build a Remarketing Audience
Before you create a single list, you need a few basics in place.
- Tagging set up: You can use either the Google Ads tag (via gtag) or the Google Ads Remarketing tag in Google Tag Manager. This tag sends visitor data back to Google Ads. If you want dynamic remarketing, you’ll also need to pass extra parameters like product IDs or page categories.
- GA4 linked with Google Ads: To use GA4 audiences, link your Google Ads account to your GA4 property and enable audience sharing.
- Consent: If you operate in regions with strict privacy rules, ensure you collect and respect user consent before deploying remarketing tags.
Once those are in place, you can create audiences either in Google Ads directly or in GA4 and import them.
Method A: Create a Remarketing Audience Directly in Google Ads
This is the most straightforward way to build remarketing lists if you want to target people based on the pages they visit.
Steps:
- Log in to Google Ads.
- Go to Tools & Settings → Shared Library → Audience manager.
- Under Segments, click the + button.
- Choose Website visitors.
- Set your rules. For example, “URL contains /pricing” to target people who visited your pricing page.
- Choose a membership duration (how long someone stays in the audience). The maximum is 540 days, but shorter windows like 30 or 60 days keep your audience fresh.
- Name your audience clearly (e.g., “Pricing Page Visitors 30d”).
- Save.
This method is quick and works well for simple retargeting, like all visitors or key pages.
Method B: Create a Remarketing Audience in GA4 and Share to Google Ads
If you want more control, GA4 audiences are the way to go. GA4 lets you build audiences based on behavior, events, or sequences.
Steps:
- In GA4, go to Admin → Data display → Audiences.
- Click New Audience.
- Use dimensions, events, or sequences to define your audience. For example: “Viewed product page AND added to cart BUT did not purchase.”
- Save your audience.
- Make sure your GA4 property is linked to Google Ads and that audience sharing is enabled.
- In Google Ads, go to Audience manager → Segments → + Google Analytics segments. Your GA4 audiences should appear here.
GA4-based audiences are powerful for event-driven targeting, such as checkout abandoners, engaged blog readers, or high-value users.
Dynamic Remarketing
Dynamic remarketing takes it to another level by showing people ads with the exact product or service they viewed.
To enable dynamic remarketing:
- Go to Audience manager → Your data sources → Google Ads tag.
- Click Set up tag and choose your business type (Retail, Education, Travel, etc.).
- Add the required parameters (like product ID, page type, or category) to your tag.
Dynamic remarketing works on Display, Performance Max, and App campaigns. It’s ideal for e-commerce, travel, and other industries where users browse multiple products.
Customer Match Audiences
Besides website and app users, you can also upload first-party data through Customer Match. This involves uploading customer email addresses or phone numbers.
Key points for 2025:
- Lists can have a membership duration of up to 540 days.
- You must refresh lists regularly to stay compliant.
- Eligibility thresholds are lower than standard remarketing lists (as low as 100 for Search).
Customer Match is powerful for re-engaging existing customers, upselling, or excluding current users from campaigns.
Audience Size Requirements You Need to Know
This is where many beginners get stuck. Even if you set up your lists, they won’t serve ads unless they meet Google’s minimum active user requirements.
- Display and YouTube: At least 100 active users in the last 30 days.
- Search: At least 1,000 active users.
- Customer Match: At least 100 users for Search in 2025 (updated from the old 1,000 requirement).
If your audience is too small, you’ll see “List too small to serve” in Audience Manager. Always plan for scale and give the lists time to build.
Applying Audiences to Campaigns
Once your lists are built, you need to apply them to campaigns.
- Go to your campaign or ad group.
- Under Audiences, select the remarketing list you created.
- Choose whether to use it in Targeting mode (show ads only to that audience) or Observation mode (collect data without restricting targeting).
For remarketing campaigns, Targeting mode is usually best. For testing, Observation can help you measure how audiences perform alongside other traffic.
Troubleshooting and QA Checklist
Most issues with remarketing come down to setup errors. Here’s a checklist to keep handy:
- Verify your tag fires using Tag Assistant or Preview Mode in GTM.
- Check Audience Manager for population size and status.
- If GA4 audiences don’t appear in Google Ads, confirm the accounts are linked and audience sharing is enabled.
- Allow 24–48 hours for new audiences to populate.
- For dynamic remarketing, make sure feed parameters match your product catalog.
- Always check Google’s policy requirements, especially for Customer Match lists.
Privacy and Consent
Remember, remarketing relies on tracking user behavior. In regions covered by GDPR, CCPA, or other privacy laws, you must collect consent before tagging. For Customer Match, you must have explicit permission to use customer data for advertising. Failing to do so can get your account flagged or suspended.
Remarketing Audience Recipes for Beginners
Here are some starter audiences you can set up today:
- All visitors (30 days): Great for broad retargeting.
- Cart abandoners (7 days): People who added to the cart but didn’t buy.
- Pricing page visitors (30 days): High-intent users who viewed pricing.
- Past purchasers (180 days): For upselling or excluding from new-user campaigns.
- Engaged blog readers (30 days): People who viewed 3+ blog pages.
These simple recipes cover the most common remarketing use cases and can be expanded as your campaigns grow.
Measuring Success
Once your campaigns are running, measure performance carefully:
- Compare CPA or ROAS for remarketing audiences versus non-audiences.
- Track conversion lag to adjust membership durations.
- Use custom reports to see which audiences deliver the best return.
Remarketing should lower your costs per conversion and improve your overall account efficiency.
Conclusion
Creating remarketing audiences in Google Ads is one of the most valuable steps you can take to improve your ad performance in 2025. By setting up proper tagging, choosing the right method (Google Ads or GA4), and meeting eligibility requirements, you’ll be able to reconnect with people who already know your brand and move them closer to conversion.
Start simple, test your audiences, and build from there. With the right setup and consistent optimization, remarketing can become one of the most profitable parts of your Google Ads strategy.
Frequently Asked Questions
In Audience Manager under Shared Library, then Segments → + → Website visitors.
Make sure your GA4 property is linked to Google Ads, and audience sharing is enabled.
Search needs at least 1,000 active users. Display and YouTube need 100.
Yes, through Customer Match, but only with consent and accurate first-party data.
