Google Analytics 4 (GA4) is Google’s analytics platform built around an event-based measurement model for websites and apps.
How it works
Events and parameters describe interactions such as page_view, search, view_item, add_to_cart, begin_checkout and purchase. A strong implementation requires consistent naming, ecommerce data layer, consent handling and data-quality controls.
Practical example
An ecommerce funnel can be built from view_item, add_to_cart, begin_checkout and purchase and then segmented by device, source/medium or customer type.
Why it matters
GA4 is valuable when data collection is designed around business questions, not when it is used only as a traffic counter.
What to watch
Duplicate events, non-deduplicated purchases, unwanted referrals and missing parameters can make dashboards look precise while being wrong.