What Key event means
Google renamed GA4 conversions to key events in 2024, while Google Ads still uses the word conversions. Marking the right actions lets you see which channels and pages produce results. Too many key events blur the picture.
Why it matters for your website
Key events tell you which visits actually turned into business, not just traffic. Without them, you can't see which pages, campaigns or channels bring in leads, so you may keep paying for ads that don't work. They also feed reports and bidding signals when your analytics is linked to ad platforms.
A roofing company marks the 'generate_lead' event from its quote form as a key event in GA4. Now its reports show that most quote requests come from organic search on its storm damage page.
Tips
- Pick only the actions that truly matter, such as form submits, calls and purchases, and mark those as key events.
- Test each key event yourself in GA4's DebugView before trusting the numbers.
- Give events clear names so anyone reading reports knows what each one means.
Common mistakes
- Marking page views or scrolls as key events, which inflates results and hides real performance.
- Counting a thank-you page view that fires again on refresh, so one lead gets counted twice.

