Glossary/Measurement & Attribution/Event Parameter
Measurement & Attribution
Event Parameter
Extra detail sent with a GA4 event, such as page title, item ID, or value, describing the context of that interaction.
By Brandon Mina·CEO, BrandPilot AI·Updated November 2026
Short answer
An event parameter is additional detail sent with a Google Analytics 4 event, such as a page title, item ID, or value, that describes the context of that interaction. Parameters make events more useful for analysis; custom parameters must be registered as custom dimensions or metrics to appear in standard reports.