Is conversion event dimension
The is conversion event dimension indicates whether a given event is marked as a key event — GA4's term for a conversion — in your configuration. GA4 derives it from each event's key-event setting, which you toggle per data stream. Because marking takes effect going forward and is configured at the stream level, the same event name can be a conversion in one stream and not another, and historical events are not retroactively reclassified.
What this means
Is conversion event tells you whether an event is flagged as a key event — the action you count as a conversion, such as a sign-up or purchase. GA4 sets the flag from the key-event toggle you control in the property.
It lets you filter reports to conversion-relevant events and verify your conversion configuration at a glance, in a vocabulary GA4 has aligned around 'key events'.
Per-stream and forward-only
Key-event marking applies from the moment you set it and is not retroactive — events that fired before you marked the name keep their prior classification. Marking is also configurable per data stream, so an event can be a key event on web but not in an app stream within the same property. Audit the flag per stream and remember that a recent change does not rewrite history.
- Reflects the key-event (conversion) flag
- Marking is forward-only, not retroactive
- Configurable per data stream
How it appears in analytics and logs
A true value means the event is currently marked as a key event. A false value, or a gap before marking, means it was not counted as a conversion at that time.
Diagnostic use case
Use is conversion event to separate key events from ordinary events in reporting and to audit which events currently count as conversions.
What WebmasterID can help detect
WebmasterID helps you keep an explicit, auditable set of conversion-classified events so reporting reflects intended key actions, not accidental ones.
Common mistakes
- Expecting key-event marking to apply retroactively.
- Assuming a flag set on one stream covers all streams.
- Confusing event count with conversion count.
Privacy and accuracy notes
This dimension is event configuration metadata, not user identity. It exposes how you classify events, carrying no personal data.
Related pages
- Event name dimension
In GA4's event-based model every interaction is an event, and the event name dimension is the label that identifies it — page_view, scroll, click, or a custom name. Reports group by event name, so consistent, well-chosen names are the backbone of analysis. Reserved and automatically collected names, plus naming drift across implementations, are the main things that complicate it.
- Event count scope dimension
Event scope is the narrowest GA4 dimension scope: an event-scoped dimension's value belongs to one specific event, not to the whole session or user. GA4 assigns scope per dimension — event, session, user, or item — and that scope governs how values aggregate. Combining dimensions and metrics from incompatible scopes in one report produces (not set) rows or inflated counts, so understanding scope is essential to reading GA4 correctly.
- Conversion events (key events)
A conversion event is an ordinary event you have marked as important — a purchase, a signup, a qualified lead. GA4 now calls these 'key events'. Nothing about the event changes; marking it tells the platform to count it as a conversion and build conversion reports around it. The decisions that matter are which events to mark, and whether to count once per session or every time.
- Event explorer
Audit which events are marked as key events.
Sources and verification notes
Last reviewed 2026-06-24. Facts are checked against primary/official sources where available; uncertain specifics are marked “Data not yet verified” rather than guessed.