KnowledgeWeb Analytics / Metric explained
Session Key Event Rate
Session KER · The percentage of visits where at least one selected key event occurred.
The metric, at your level
Understand Session KER in context.
Simply explained explanation
The percentage of visits where at least one selected key event occurred.
Professional explanation
Proportion of sessions with one or more key events; a session-based GA4 outcome measure.
Analytical explanation
More useful than raw counts when channel volumes shift, but comparisons require stable event configuration and source grouping.
Technical explanation
GA4 exposes sessionKeyEventRate and event-scoped variants. Distinct qualifying sessions, not all key-event occurrences, form the numerator.
Four complementary explanations — choose your level. Technical definitions are platform-specific where noted.
Calculation / definition(Sessions with ≥1 key event ÷ sessions) × 100
↗ How to use it
Identify the exact key event used.
⚠ Common interpretation mistake
Multiple events in a session do not make its session rate exceed 100%.