How do you set up conversion tracking in Google Ads?
Decide which actions count, add the Google tag to every page, create a conversion for each action, link Google Analytics 4 (GA4) if you use it, and test with a real submission before the ads go live. For a service business the actions are usually a form submit and a phone call, not a click.
Google describes the idea this way: "You choose what you identify as valuable, like a purchase, sign-up, or phone call, and Google Ads will then help you get the most out of your campaigns." The steps below follow that order, because each one depends on the one before.
What should count as a conversion?
A conversion is the action that matters to the business, so for most service businesses it is a submitted form or a completed phone call. A click on an ad is not a conversion. It shows interest and says nothing about whether anyone reached you.
List the ways a customer can reach you. For example (illustrative), a plumbing company might have a quote form, a callback form and a phone number printed at the top of every page. That is three actions, and each needs its own counting rule.
Keep the list short, because every action added is one more thing to set up and test. A newsletter signup is not worth the same as a quote form, so the two should not share a goal.
How do you count form submissions?
Count a form by tracking the thing that only happens after a successful submit: a thank-you page that loads, or a form submit event that fires. Pick the one that matches how your form behaves, and avoid counting a button click, because a click can happen without a message being sent.
Using a thank-you page
If the form sends people to a confirmation page, that page load is a clean signal. Google Ads lets you create a conversion from a page URL without editing code, and the match options include a URL that contains a phrase such as "thank-you". The same page notes that one route is "the fastest and easiest way to set up a conversion action."
The weak point is the page itself. If the thank-you URL can be opened directly, it is counted without a form being sent.
Using a form event
Some forms show a message on the same page and never load a new one. GA4's enhanced measurement can record two form events, and Google defines one of them like this: "'form_submit': when the user submits a form." Google also states: "You're required to ensure that no personally identifiable information is collected." Test it on your own form before relying on it.
One conversion or every conversion
For a lead form, Google offers a counting choice. Its help page says that if you are generating leads, "you might want to track every sale, but only one, unique lead per ad click." Choosing "one" for a form means a visitor who submits twice from the same click is not counted twice.
How do you count phone calls?
Google Ads can count three kinds of calls: calls directly from your ads, calls to a phone number on your website, and taps on a phone number on a mobile website. Each is set up separately, and a call only counts as a conversion when it lasts longer than a minimum length you choose.
Google's own list reads "Calls directly from your ads, calls to a phone number on your website, and clicks on a phone number on your mobile website." For calls from your website, Google's help page says this kind of tracking "tracks a call as a conversion when it lasts longer than a minimum length you set."
For example (illustrative), a wrong number that lasts four seconds is a call but not a lead, so set the minimum to match.
Website call tracking uses a snippet that swaps your number for a Google forwarding number on the page, which means a developer needs to be able to edit the site. Google's page also warns that one option "isn't recommended if your website uses Dynamic Number Insertion (DNI) or third-party call tracking."
One more detail from Google: "Google Ads attributes these conversions to the date of the ad click." In practice, a call that arrives on Friday is reported against the day of the click that caused it, not the day of the call.
How do GA4 key events fit in?
In GA4 an important action is a key event, and in Google Ads an important action used to measure and bid on ads is a conversion. Mark the event as a key event in GA4, link the two accounts, then import it into Google Ads as a conversion.
Google changed these terms, so old guides mix them. Its explanation: "Events that measure actions that are important to the success of your business are now called 'key events.'" And: "A 'conversion' now refers to an important action that you want to use to measure the performance of your ad campaigns and optimize your bidding strategy."
Mark the event as a key event
Google says "Any event you collect can become a key event." You find the event in GA4, then mark it. A newly created event may have to fire once before it appears in the list, so run a test submission first.
Link the accounts
To import, Google says you need to "link your Google Ads account to a Google Analytics account and turn on auto-tagging in your Google Ads account." Google's pages add that if you use click trackers or server-side redirects, they must "pass on the GCLID (Google click identifier) to your landing pages."
Import and wait
The rule is firm: "Only events marked as key events in Google Analytics are eligible for import." Then expect a delay. Google says "After linking accounts or marking an event as key events, it can take 24 to 48 hours for the system to propagate before the import options appear in Google Ads."
You can use the Google tag, GA4 imports, or both. Google's page says you can use "any combination of these 2 at the same time." Pick one source for each action, and check in the test that the same form is not counted by both.
How do you test before spending money?
Submit your own form, place your own call, and check that each one shows up where it should: first in GA4, then on the conversion status in Google Ads. Do this before the campaign is switched on, so a broken tag costs nothing.
Three Google tools help.
- **Tag Assistant.** Google says it "is a troubleshooting tool that helps you verify the implementation and functionality of tags on your website."
- **DebugView in GA4.** It "displays the events and user properties that Analytics collects from a user in real time, allowing you to troubleshoot issues as you install your tags."
- **The Realtime report.** It "lets you monitor activity on your website or app as it happens," including key events by event name.
Then check the conversion status in Google Ads. Google says "It may take up to 48 hours for the conversion status to update in Google Ads after implementing or correcting your tags," so a status that has not changed on the first day is not yet a failure.
A good test has three outcomes: the submission reaches your inbox or CRM, the event appears once in GA4, and Google Ads records it against the right action. Fix any miss before the first ad runs.
What goes wrong most often?
The common faults are double tagging, a wrong counting choice, a lost click identifier and a conversion window that does not fit how long your customers take to decide. All four can be found in a test, and none of them shows up in a click report.
- **Double tagging.** Google warns that CMS plugins that manage tags can cause trouble: "ensure that you're not double-tagging your site, which can cause duplicate conversion reporting." A plugin and a manual tag on the same form is the usual cause.
- **The wrong action as the goal.** Google says you should set each action as Primary (biddable) or Secondary (observation-only) deliberately, because the choice affects how automatic bidding learns. An action that is only watched should not be the one the ads are trained on.
- **A window that is too short.** Google defines a conversion window as the period after an ad interaction during which a conversion is recorded. Its page says that if you set 7 days, a conversion that happens later "won't be recorded." If your customers take weeks to decide, choose accordingly.
- **A site change.** A rebuilt form or a changed thank-you URL can end the counting without warning, so repeat the test after either.
Tracking shows which clicks became calls and forms, so any change is made on evidence, and it does not make the ads work by itself.
What does Devodin set up?
On Marketing work, Devodin builds the tracking in week one, before an ad runs. The service page says: "Tracking is built in Google Analytics 4 and Google Tag Manager, with GA4 conversion tracking set up so results are reported by calls, forms and sales."
The same page says the client owns the ad account and the tracking from day one. For how paid search compares with the alternatives, read Google Ads or Facebook Ads. For where tracking sits among the other pieces of getting inquiries, see how to get more leads for your business and what Devodin's five services do.
If you set this up yourself, work through the list in order. If you would rather not, have tracking set up before ads go live, with calls, forms and GA4 counted before the first click is paid for.
