# GA4 Audiences for Remarketing and Analysis

> Build GA4 audiences marketers actually use: copyable definitions, time-windowed conditions, the 100-audience limit and sharing to Google Ads.

Source: https://mentionx.ai/learn/ga4/ga4-audiences-remarketing  
Author: Dipuck Jones, founder of MentionX  
Updated: 4 November 2026  
Level: Practitioner

**A GA4 audience is a set of users who meet conditions you define, re-evaluated as new data arrives, and it can be used both as a report comparison and as a remarketing list in Google Ads.** Standard properties can hold 100, so build a few precise ones rather than many vague ones.

> **Key takeaways**
>
> - Audiences can use dimensions, events, metrics and sequences, with time windows such as "more than 5 in any 7 days".
> - Membership is re-evaluated; users drop out when they stop meeting the criteria.
> - Google Ads lists are pre-filled with up to 30 days of data where available.
> - Limit: 100 audiences per standard property, 400 on 360.
> - Audiences are not retroactive inside GA4 reports; build them before you need them.

*Checked 4 November 2026 (CET) against Google Analytics Help and Google developer documentation. GA4 menus and limits change, so confirm in your own property. "Our view" marks MentionX opinion. Ledgerline is a fictional company used for illustration.*

## Five audiences to copy

| Audience | Conditions | Membership duration |
|---|---|---|
| High-intent visitors, no lead | Include: page_view where Page path contains /pricing. Exclude: generate_lead | 30 days |
| Demo requested | generate_lead where form_id = demo_request | 180 days |
| Engaged blog readers | page_view where Page path starts with /blog, event count > 3 in any 7 days | 60 days |
| AI assistant arrivals | Session default channel group exactly matches AI Assistant | 90 days |
| Trial, not paid | Include sign_up; exclude purchase | 30 days |

## How do you create one?

1. Go to **Admin → Data display → Audiences → New audience**.
2. Choose **Create a custom audience**.
3. Add conditions, choose user, session or event scope, and use **Add sequence** for "did X, then Y".
4. Set membership duration and, optionally, an **audience trigger** to log an event when someone joins.
5. Check the summary card for an estimate based on the last 30 days, then save.

> **Pro move:** add an audience trigger event, such as `aud_high_intent`, to the high-intent audience and mark it as a key event only if sales agrees. It gives you a countable "became sales-ready" signal in every report.

*Our view:* exclusions are the most valuable part of a remarketing audience. Excluding converters and staff saves more budget than any clever inclusion rule.

Audience definitions that touch personal data should follow your privacy policy. The [Claude marketing governance and privacy lesson](https://mentionx.ai/learn/claude/claude-marketing-governance-privacy) covers the same thinking for AI tools.

Next: [Attribution models and lookback windows](https://mentionx.ai/learn/ga4/ga4-attribution-models-lookback). Or return to the [GA4 for Marketers track](https://mentionx.ai/learn/ga4/ga4-for-marketers).

## Common questions

**Do GA4 audiences fill with past users?** For Google Ads, GA4 adds users who met the criteria in the last 30 days when that data is available. Within GA4, membership changes from creation onward.

**How many audiences can a GA4 property have?** Up to 100 on a standard property and 400 on Analytics 360.

**Can I use GA4 audiences in Google Ads?** Yes, once the properties are linked and personalised advertising is enabled. Audiences appear as user lists in Google Ads.

## Sources

- Google Analytics Help, [Create, edit, and archive audiences](https://support.google.com/analytics/answer/9267572)
- Google Analytics Help, [Connect Google Ads to Google Analytics](https://support.google.com/analytics/answer/9379420)
- All accessed 4 Nov 2026.

## Frequently asked questions

### Do GA4 audiences fill with past users?

For Google Ads, GA4 adds users who met the criteria in the last 30 days when that data is available. Within GA4, membership changes from creation onward.

### How many audiences can a GA4 property have?

Up to 100 on a standard property and 400 on Analytics 360.

### Can I use GA4 audiences in Google Ads?

Yes, once the properties are linked and personalised advertising is enabled. Audiences appear as user lists in Google Ads.

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Written and reviewed by Dipuck Jones for MentionX Learn. The HTML version of this page: https://mentionx.ai/learn/ga4/ga4-audiences-remarketing