You’re paying for ads — or spending grant money on them — and the reports show clicks, impressions, and cost. What they don’t show is the question that matters: did any of those clicks turn into a call, a form submission, a donation, or a sale? If that answer is missing, you’re guessing at your ads, not managing them.
Quick answer: GA4 — Google Analytics 4 — records things people do on your website as “events.” When you mark an important event, such as a completed contact form or a phone call click, as a “key event,” GA4 treats it as a conversion. Google Ads can then use those conversions to judge which ads, keywords, and audiences are actually producing results — instead of just producing traffic.
1. Start with what a conversion actually is
A conversion is not a visit. A conversion is the action you wanted the visitor to take in the first place.
For a Fresno service business, that might be a phone call or a completed quote-request form. For a nonprofit in Clovis, it might be a donation, a volunteer signup, or a completed registration. For an online store, it’s a purchase.
That definition matters, because everything else in GA4 and Google Ads builds on it. If the action is vague — “someone looked at a page” — the data that follows will be vague too. A page view tells you someone arrived. It doesn’t tell you they did anything that helps your business.
2. GA4 thinks in events, not visits
Older versions of Google Analytics were built around pageviews and sessions. GA4 works differently: almost everything in GA4 is an “event.”
An event is simply a record that something happened. GA4 automatically records some events, such as a page being viewed, a visitor scrolling down a page, or someone clicking a link that leads off your site. Other events reflect more specific actions on your site, such as starting a form, submitting a form, clicking a phone number, or completing a purchase.
Think of events as a raw activity log — what visitors did, not just that they showed up.
3. A key event is an event you say matters
Most events are just information. A “key event” is different — it’s an event you have identified as important to your business. Key events are what GA4 reports as conversions.
That distinction is the heart of conversion tracking. GA4 records lots of activity, but only actions you designate as key events count as results. If a completed contact form is a key event, you can separate “people who visited” from “people who actually reached out.” If it isn’t, a busy day of traffic can look like a successful day of marketing when it wasn’t. Google renamed “conversions” to “key events” inside GA4, but the job is the same: a key event marks the finish line.
4. How Google Ads uses that signal
Google Ads and GA4 are separate tools, but they can share information. When they are linked, key events from GA4 can be used in Ads reporting, and Ads can bid based on them.
That matters because modern Google Ads bidding is largely automated. Google’s system decides in real time how much to bid based on how likely that person seems to convert. It learns from the conversion data you feed it — which searches led to calls and forms, and which only led to a quick visit.
Without conversion data, that learning has nothing solid to learn from. The system can still bring you clicks, and the reports will still look busy. But it will optimize toward traffic, not toward outcomes, because traffic is all it can see. That’s what “flying blind” means in practice: money going out, activity coming back, and no way to tell which ads earned their keep.
5. What Google looks for in trustworthy tracking
Google doesn’t grade your intentions — it works from the signal it receives. A trustworthy signal has a few clear qualities.
First, the action is specific. A completed form is clear; a view of the form page is not the same thing, because plenty of people view a form and never send it.
Second, the same action is counted consistently, and counted once. If one real enquiry is recorded twice, your results look better than they are, and Ads may chase more of the wrong traffic. If real enquiries aren’t recorded at all, good ads can look like failures and get paused by mistake.
Third, the definition stays stable. If you change what counts as a conversion every month, month-to-month comparisons stop meaning much, and the bidding system has to relearn what success looks like.
Finally, where a conversion has a value — a purchase or a donation, for example — that value helps Google tell the difference between a small result and a big one, instead of treating every conversion as identical.
6. Why GA4 and Google Ads numbers rarely match perfectly
Business owners often ask why GA4 and Google Ads show different numbers for the same week. A small difference is normal.
The tools don’t always credit a conversion to the same day. Ads may credit the day the ad was clicked, even if the person returned and completed the form days later, while GA4 focuses on when the conversion happened. They also handle visitors who decline cookies differently, and some activity may be modeled rather than directly observed.
What should concern you is not a small gap — it’s a conversion count that is always zero, suddenly doubles, or drops to nothing while your phone is still ringing. Those are signs the signal itself, not just the reporting, needs attention.
7. Signs your ads are flying blind
Patterns we see again and again in Fresno and Clovis accounts: Google Ads reports plenty of clicks but no conversions, even though calls and form submissions are coming in. Or the main “conversion” being reported is just a page view, so almost every visitor counts as a success. Or conversions were being recorded, then stopped on a particular date — often around the time a website, form, or donation page changed.
None of those patterns tells you your ads are bad. They tell you the measuring instrument is off. Fixing the ads before fixing the measurement usually wastes money, because you can’t tell whether the fix worked.
When it’s not a DIY fix
Spotting the patterns above is work any owner can do. Sorting it out gets harder when a form, booking system, or donation platform lives separate from your main website, when the same action is counted more than once, when nothing has recorded for weeks despite real enquiries, or when Ads and GA4 disagree so widely that neither number can be trusted. Changing settings at random can make it worse — bad conversion data quietly steers future ad spend in the wrong direction.
Want a hand with this? Book a free 15-minute diagnostic: https://calendly.com/on-target-support/free-it-diagnostic — or take the full free 30-minute assessment: https://calendly.com/on-target-support/free-it-assessment
— Bill Thompson, On-Target Computers. Managed IT for small businesses and nonprofits in Fresno & Clovis. IT Done Right. (209) 741-4694
