Cross-domain tracking in Google Analytics 4 (GA4) allows you to accurately measure user journeys across multiple websites you own, presenting a unified view of customer behaviour – crucial if your business operates separate sites for sales, support, or different product lines.
- GA4 Data Streams: As of early 2026, GA4 utilises Data Streams to collect data. Each website needing tracking requires its own Data Stream within your GA4 property.
- Measurement Configuration: Current systems include a dedicated ‘Cross-Domain Measurement’ section within the Data Stream settings. You’ll define the domains you want to track as a linked group.
- Consent Mode Integration: In 2026, Australian privacy regulations are increasingly stringent. GA4 now features enhanced Consent Mode integration, allowing you to respect user privacy choices regarding cookies and data collection across all linked domains.
- Enhanced Ecommerce: Cross-domain tracking is vital for accurate Enhanced Ecommerce reporting, especially if your checkout process spans multiple domains.
For Australian businesses, this is particularly relevant given the common practice of utilising separate domains for different aspects of the customer journey – for example, a primary marketing website and a dedicated online store. Ensuring accurate tracking across these domains is essential for understanding the true return on your digital marketing investment and complying with Australian Consumer Law regarding transparent data practices.
Instead of navigating these technical complexities yourself, let ROI.com.au handle the setup and optimisation of your GA4 cross-domain tracking. Contact our team today and we can take care of all this for you.
