What are custom dimensions in GA4 and how are they used?
Asked on Sep 04, 2025
Answer
Custom dimensions in GA4 allow you to collect and analyze data that is not automatically tracked by Google Analytics. They enable you to extend the default data model by capturing additional information about your users or events, which can be particularly useful for more detailed analysis and reporting.
Example Concept: Custom dimensions in GA4 are user-defined attributes that you can use to segment and analyze data beyond the standard dimensions. For instance, you might create a custom dimension to track user membership levels (e.g., "Gold", "Silver", "Bronze") or specific event details like "Product Category". These dimensions are set up in the GA4 interface under Admin → Property → Custom Definitions and can be used in reports to gain deeper insights into user behavior.
Additional Comment:
- Custom dimensions must be defined in GA4 before they can be used in reports.
- They can be set at the user, session, or event level, depending on the data you wish to capture.
- Ensure that your custom dimensions align with your business objectives for meaningful analysis.
Recommended Links: