Marketing / Analytics
Average Engagement Time engagement time (GA4) vs average session duration / time on page (UA)
How long visitors actually spent, the "how sticky is it" time metric.
The fork, why two teams get different numbers
The metric changed identity between analytics generations.
In the Metric Library
- The full fork, both definitions worked all the way through
- The trap that makes the number lie, on a real export
- Every formula variant, spelled out
- The reconciliation anchor, what to tie it to and when to refuse
Reference: Google Analytics 4 measurement documentation (reference) · web-analytics convention