Google Signals enriches your reports with data from users who are signed in to Google and have Ads Personalization turned on (mainly age, gender and interests). When activated in GA4 (Google: activate Google signals), it relates to:
- Cross-device journeys: send a User-ID (Signals no longer does this in reports, see reporting identity).
- Remarketing: since 15 June 2026, ads personalisation and remarketing are governed by Consent Mode, not by the Google signals switch (Google announcement).
- More detailed demographic and interest data
Let’s explore how it works and walk through a practical use case using demographic data.
How Google Signals Works
When enabled in GA4, Google Signals:
- Associates user data from signed-in Google accounts (where Ads Personalization is on).
- Aggregates this data, which is subject to data thresholds. Compliance still depends on your consent setup.
- Enhances reports with demographics and interests.
The data is always aggregated and subject to privacy thresholds. It also requires users to have given consent via your site’s cookie banner or consent mode implementation.
How to Activate Google Signals in GA4
To turn it on:
- Go to Admin > Data collection and modification > Data collection.
- Enable Google Signals data collection.
- Review and accept the terms and conditions.
Once activated, you’ll start seeing data in GA4 reports such as:
- Demographics (Age, Gender, Interests)
Use Case: Using Demographic Data to Refine Your Marketing Strategy
Scenario:
An e-commerce fashion brand wants to understand who their best converting users are, to refine their paid media targeting.
Steps:
- Enable Google Signals in GA4 to collect richer demographic data.
- Go to Reports > User attributes > Demographic details (Google: demographic details report).
- Add a comparison (or use an Exploration segment) for users who triggered
purchase. - Analyze:
- Top age groups (e.g., 25–34 years old)
- Gender distribution
- Top interest categories (as listed in your Demographic details report)
- Build a GA4 audience of buyers and share it with Google Ads for remarketing (Google Ads no longer generates similar audiences since May 1, 2023, see Google).
- Adjust campaign messaging to better resonate with high-converting segments.
Expected outcome: better-targeted messaging. Measure the ROAS impact before and after.
Final Thoughts
Google Signals in GA4 is useful for businesses seeking demographic insights, as long as consent is collected properly. It enables smarter segmentation, campaign optimization, and more effective remarketing.
Keep in mind:
- Always honor user consent preferences.
- Data may be limited due to privacy thresholds.
- Use the insights as a complement—not a replacement—for your marketing intuition.
Need help interpreting your GA4 reports or making the most of Google Signals? Don’t hesitate to reach out to your analytics expert. 😉