● Google Analytics & GA4

What are GA4 comparisons and when to use them?

GA4 comparisons allow you to analyse performance differences between distinct segments of your website data, providing insights into how different user groups behave. As of early 2026, these comparisons go beyond simple date ranges, offering granular analysis to optimise your marketing spend.

  • Segment Overlap: Identify how different audience segments intersect – for example, comparing users from Facebook ads versus Google Search.
  • Custom Dimensions & Metrics: Compare performance based on your own defined data points, like customer lifetime value or product category.
  • Predictive Metrics Comparison: Now features the ability to compare predicted purchase probability across different segments.
  • Automated Insights: GA4 automatically highlights statistically significant differences in performance, saving you time.

In 2026, Australian businesses are increasingly focused on data privacy, and GA4’s comparison tools help demonstrate the value of first-party data. Current systems include robust consent mode integration, ensuring comparisons are compliant with Australian Privacy Principles (APPs). This allows you to accurately assess campaign effectiveness even with increasing restrictions on third-party cookies and tracking.

Instead of navigating these technical complexities and ensuring accurate data interpretation, let ROI.com.au handle your GA4 setup and analysis. Contact our team today and we can take care of all this for you.

Written by: Ewan Watt Founder & CEO – ROI Growth Agency | 1300 650 274 | Bachelor of Business in Marketing 25+ years of digital marketing experience
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