The link between GA4 and Google Ads is the procedure that unites Google’s analytics platform, called Google Analytics 4, with the Google Ads advertising platform. Once activated, data about advertising campaigns flows automatically into GA4 properties, letting you observe user behavior after a click on an ad. Without this link the two platforms remain separate and the analysis of the economic return of campaigns is partial.
The integration is considered a standard practice for anyone managing digital marketing activities, because it lets you attribute conversions, revenue and interactions to specific campaigns, ad groups and keywords. The link is configured at the property level and can be activated either from Google Ads or from GA4, as long as the user has the necessary permissions on both accounts.
What changes in reports when the two accounts are linked
When the link is active, GA4 automatically imports cost, click and impression data from Google Ads. This information is associated with the sessions generated by the ads, so that GA4 reports show not only user behavior but also the spend incurred to obtain that traffic. The result is an integrated view of performance, combining advertising metrics and analytics metrics in the same interface.
The link also enables two-way data exchange: GA4 can send conversions recorded on the site to Google Ads, while Google Ads provides GA4 with campaign information. This exchange lets you optimize campaigns based on actions actually taken by users, not just on clicks.
Who can activate the link and with which permissions
To activate the link you need a Google Ads account and a GA4 property. The user performing the operation must have the administrator role on both Google Ads and the GA4 property. Without these permissions the linking option is not available.
It is also important that the Google Ads account and the GA4 property belong to the same organization or to parties that explicitly authorize access. The link can be revoked at any time, and revocation stops the import of advertising data.
Difference between linking and manual import
Linking is a stable, automatic integration, while manual data import requires periodic operations and does not guarantee the same consistency. Linking keeps data aligned over time without repeated interventions.
The two ways to activate the integration
Activation can happen from two access points. From Google Ads you go to the account settings and the dedicated links section, where you select Google Analytics and choose the desired property. From GA4 you go to the admin settings, the item dedicated to links with products, and start the guided procedure.
In both cases the system asks you to authorize the data exchange and confirm the properties involved. At the end of the operation advertising data starts appearing in GA4 reports, generally within a time frame that depends on the processing latency of the two platforms.
How to check that data is arriving
After activation it is good practice to check that campaigns appear in GA4 reports and that cost metrics are populated. If data does not appear, it is worth checking permissions and waiting for processing to complete.
What you gain from united data
The main advantage is the ability to measure return on advertising investment by combining cost and revenue in the same platform. In addition, sending conversions from GA4 to Google Ads improves the quality of automatic campaign optimization.
A further benefit concerns user journey analysis: thanks to the link you can observe how users coming from ads interact with the site, which pages they visit and when they leave. This information helps improve both campaigns and the site experience.
Why the numbers from the two platforms do not match
The link does not eliminate the physiological differences between the data of the two platforms, which can diverge for various reasons, including different attribution models and different conversion windows. It is therefore normal to observe values that do not perfectly coincide.
GA4 and Google Ads: what each platform does
| Aspect | Google Ads | GA4 | After linking |
|---|---|---|---|
| Cost data | Available | Not available | Visible in GA4 |
| Conversions | Recorded on the platform | Recorded on the site | Exchanged between the two |
| Attribution | Advertising model | Analytics models | Comparison possible |
| User behavior | Limited | Detailed | Integrated with campaigns |
| Campaign optimization | Based on Ads data | Not direct | Enriched by GA4 conversions |
The sequence of operations, in summary
- Access Google Ads with an administrator account.
- Open the account settings and the links section.
- Select Google Analytics among the available products.
- Choose the GA4 property to link.
- Confirm the authorizations requested by the system.
- Repeat the verification also from GA4 settings.
- Check that advertising data appears in reports.
- Monitor the consistency of metrics periodically.
Frequently asked questions
Is linking mandatory?
No, it is not mandatory, but it is strongly recommended for those who invest in advertising and want to measure results completely.
Can I link multiple Google Ads accounts to a single GA4 property?
Yes, a GA4 property can be linked to multiple Google Ads accounts, as long as you have the necessary permissions on each of them.
What happens if I revoke the link?
Revocation stops the import of advertising data into GA4 and the exchange of conversions, but does not delete data already recorded.
Why do Google Ads and GA4 data not match?
Differences arise from different attribution models, conversion windows and processing criteria between the two platforms.
Is an additional tracking code needed?
No, the link uses the tracking already present on the GA4 property and does not require further technical configurations on the site.
How long does it take to see data?
Advertising data starts appearing after the two platforms process it, with times that can vary from a few hours to a day.
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