While GA4 automatically understands what "Revenue" or "Quantity" is, what if you run a SaaS company and want to track the number of "Credits" a user consumes, or a publisher wanting to track "Article Reading Depth (percentage)"?

You would send that numeric value as an event parameter, and then register it as a Custom Metric in the admin dashboard so you can visualize the average reading depth across different traffic sources.

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Related Terms

Custom Dimension

A user-defined text attribute registered in the GA4 admin that allows you to see and filter custom event parameters or user properties in your reports.

Event Parameter

Additional pieces of metadata sent alongside an event to provide specific context about the action that occurred.

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Definitions

What is Custom Metric?

A user-defined numerical value registered in the GA4 admin that allows you to sum or average custom data points.

Similar to Custom Dimensions, Custom Metrics allow you to report on non-standard numeric values you pass into GA4.