For a small business, a GA4 key event is simply a tracked action that matters to your bottom line, such as a phone call, a form submission or a booking. Track those three kinds of actions, keep the list short, and link GA4 to Google Ads so both tools count the same results. That is the whole job, and most of the work is in doing it cleanly.
One note on wording: in March 2024 Google renamed GA4 “conversions” to “key events.” The word “conversion” now refers to what you count inside Google Ads. This guide uses both terms the way Google does today.
What is a key event in GA4?
Google defines a key event as an event that measures an action that is particularly important to the success of your business. GA4 records many events automatically, like page views and scrolls. Most of them are background noise. You choose the few that matter and mark them as key events, and GA4 then reports on them separately.
The old name “conversions” caused confusion because GA4 and Google Ads each counted conversions by their own rules and often showed different totals. The rename separates the two: key events live in Analytics, conversions live in Google Ads. You can still create a Google Ads conversion from a GA4 key event, which is how the two tools end up reporting the same numbers.
Which actions should a small business track?
Pick actions that lead to revenue, not actions that merely feel like progress. For most local and service businesses, that means three groups.
Phone calls
For many businesses, calls are the main source of customers. Track clicks on tap-to-call phone links on your site as an event, and consider call tracking software so you can see which calls came from search, ads or your Google Business Profile. A click on a phone number shows intent, but it does not prove a conversation took place, so use real call records where you can.
Form submissions
Track the thank-you step, not the button click. If someone clicks “Submit” but the form fails or has a missing field, a button-click event counts a lead you never received. Fire the event only when the form actually goes through, either on a confirmation page or with a form-success event from your form plugin.
Bookings and purchases
If you take appointments or sell online, track the completed booking or order. Where your platform allows it, send the value as well, so you can compare channels by revenue and not only by count.
How do you set up key events?
- Write down the three to five actions that lead to money.
- Make sure each one creates an event in GA4. Many actions are collected for you; others need a Google Tag Manager tag or a plugin.
- Test each action yourself using GA4’s DebugView or Tag Assistant, and confirm the event fires once.
- Mark the event as a key event in GA4’s admin settings.
- Check that the event appears in reports within a day or two.
Our Conversion Tracking and Attribution service starts with exactly this kind of audit: every tag compared with the real calls and leads your business received.
How do you keep the data clean?
Bad data is worse than no data, because you act on it. These habits prevent most problems.
Track fewer things
Marking every click as a key event makes the reports meaningless. A newsletter signup and a quote request are not worth the same, so keep the high-value actions as key events and watch the small ones as ordinary events.
Exclude your own traffic
Staff, your web developer and your own test submissions inflate numbers. Use GA4’s internal traffic filters to leave them out, and delete or label test leads in your records.
Watch for duplicates
A thank-you page that people reload, or two tags firing for the same form, will count one lead twice. Test after every website or plugin change, because updates quietly break tracking more often than anything else.
Use consistent campaign tags
Add UTM parameters to links in emails, social posts and ads, and use the same spelling each time. “Facebook,” “facebook” and “fb” show up as three different sources.
Respect privacy choices
If your site shows a cookie or consent banner, make sure tracking follows what visitors choose. Ask your web team how Google Consent Mode is configured on your site.
How do you link GA4 to Google Ads?
Linking the two accounts lets Google Ads use your GA4 key events, so you can see which campaigns and keywords produce calls and leads, not just clicks. In GA4, open the admin area, find the Google Ads links section, and connect the Ads account you manage. Then, in Google Ads, import the key events you want to optimize for.
Be selective about what you import. Google’s smart bidding learns from the actions you tell it to count. If you import a weak action such as a page view, the system will chase page views. Import the actions that are close to revenue, such as completed forms and booked appointments. If you are new to this, our Google Ads management setup includes this step as standard.
Google notes that Google Ads conversions do not appear in standard Google Analytics reports, though you can review them in the Advertising section. Expect some difference between the two tools and judge the direction of each, not an exact match.
A key event checklist
- Every key event maps to a real business outcome: a call, a lead or a booking.
- Form events fire only on successful submission.
- Each event was tested and fires exactly once.
- Internal traffic is filtered out.
- GA4 is linked to Google Ads, and only revenue-related events are imported.
- UTM tags follow one naming pattern.
- Someone checks the numbers against real calls and leads every month.
That last line matters most. Compare GA4’s count of form leads with the actual messages in your inbox or CRM. If they do not roughly agree, fix tracking before you read any report. Our analytics reporting work builds that check into a monthly review.
Frequently asked questions
Did my old GA4 conversions disappear?
No. Existing conversions carried over automatically as key events. Only the name changed, along with the label for what you count inside Google Ads.
Should I count a phone number click as a lead?
Count it as a signal, and treat call records as the proof. If you can, track calls that last a meaningful length, so a wrong number does not look like a customer.
Why do GA4 and Google Ads show different numbers?
They use different attribution rules and counting windows. Linking them and importing the same key events narrows the gap, but small differences are normal.
How many key events do I need?
Usually three to five. If you cannot say how an event connects to revenue, it probably should not be a key event.
Want your tracking checked?
If your reports and your real leads do not match, BERI Consulting can find out why. Book a discovery call and we will review what you track today, or start with a free website scan.
