Key Events
Also known as: GA4 conversions, GA4 key events
GA4's term for the events you have marked as most important to your business, such as form submissions, purchases, or calls. Formerly called conversions inside GA4, key events are the actions you track for reporting and can share with Google Ads as conversions.
Key Takeaways
- Key events are GA4's term for the events you have marked as most important to your business, such as form submissions, purchases, or calls.
- GA4 renamed these from conversions to key events, though they can still be shared with Google Ads as conversions.
- Key events drive funnel reports, audience building, and bidding signals across analytics and ads.
- Marking too many events as key dilutes focus, so the status should be reserved for actions with clear business value.
- Choosing key events deliberately keeps teams focused on outcomes that move revenue rather than vanity interactions.
How It Works
In GA4, everything a user does is tracked as an event. A key event is simply a regular event you have flagged as important, telling GA4 to treat it as a primary success metric. You mark an event as key in the admin settings, and from then on it feeds conversion reporting, funnels, and audiences.
Because every measured action is a GA4 Event, the challenge is deciding which ones matter. Key events should map to real outcomes, aligning with how your Conversion Tracking and, ideally, your North Star Metric define success.
GA4 can share key events with Google Ads to inform bidding, so their accuracy directly affects ad optimization. The discipline is restraint. Marking soft signals like Engagement Rate proxies or scroll depth as key events buries the actions that truly matter. Reserve the status for high-value steps and keep the rest as standard events for context.
Why It Matters
Key events define what success looks like in your analytics, driving funnel reports, audience building, and bidding signals. Choosing them deliberately keeps teams focused on outcomes that move revenue rather than vanity interactions like scroll depth.
Example
An ecommerce store sets its GA4 key events to purchase, begin_checkout, and newsletter signup, leaving scroll and page_view as standard events. Because only meaningful actions carry key event status, the conversion reports stay clean, the Google Ads bidding optimizes toward real revenue steps, and the marketing team can see exactly where shoppers drop out of the funnel.
Common Mistake
Marking too many events as key, so everything counts as a conversion and nothing stands out. Reserve key event status for actions with clear business value and keep the rest as standard events.
Frequently Asked Questions
What is the difference between key events and conversions in GA4?
They are essentially the same concept renamed. GA4 now calls the important events you track key events. The term conversions is reserved for the key events you import into Google Ads for bidding and campaign reporting.
How do I mark an event as a key event?
In GA4 admin, open Events, find the event, and toggle it to mark it as a key event. The event must already be firing and collecting data. Once marked, it starts appearing in conversion-related reports and can be shared with Google Ads.
How many key events should I have?
There is no fixed number, but fewer, well-chosen key events work better. Reserve the status for actions with clear business value like purchases, qualified leads, or bookings. Marking too many dilutes reporting and makes it hard to see what matters.
Can key events be shared with Google Ads?
Yes. You can import GA4 key events into Google Ads as conversions to inform bidding and measure campaign performance. Accurate, well-scoped key events make that shared signal more reliable for automated bidding strategies.