Plenty of small businesses run Google Ads for months without knowing which clicks turned into customers. The spend is easy to see. The return is not. Conversion tracking closes that gap by recording what people do after they click your ad.
Without it, you are judging campaigns on clicks and impressions alone. Those numbers tell you about attention, not sales or enquiries. With tracking in place you can see which keywords and ads bring in real results. That makes every budget decision easier to defend.
What counts as a conversion
A conversion is an action you value that happens after someone interacts with your ad. Google lists website purchases, newsletter sign ups and button clicks as common examples. It can also be a phone call, an app install or an action that happens offline. You decide which actions matter for your business.
For a local trade business that might be a quote request form or a call. For an online shop it is usually a completed order. For a service firm it could be a booking or a brochure download. Pick the actions that sit closest to actual revenue.
Google’s help page on the different ways to track conversions sets out the main types. These are website actions, app actions, phone calls and offline actions. You can track several at once by creating a separate conversion action for each one. One action might count purchases while another counts calls.
How website tracking works
When someone clicks your ad, Google Ads stores cookies that hold information about that click. The click details arrive through a parameter called the GCLID, short for Google click identifier. When the person later completes your chosen action, a tag on your site reads the cookie. It then sends the conversion back to Google Ads.
The tag Google recommends is the Google tag, combined with an event snippet. Together they set first party cookies on your own domain. Google explains this in its article on how Google Ads tracks website conversions. The same page notes that click trackers and redirects must pass the GCLID through to your landing page.
Some conversions cannot be observed, for example when browser settings block cookies. In those cases conversions may be undercounted. Google fills part of the gap with modelled conversions, which are estimates. It is worth remembering that your reports are a close picture rather than a perfect count.
Setting up your first conversion action
In Google Ads, conversion actions are created under Goals. Google walks you through adding your website as a data source and scanning your domain. You then pick a category that best matches the action you want to measure. The category groups related conversions together in your reports.
Next you define the conversion itself. The simplest method uses a URL, such as a thank you page that only loads after a form is sent. A code method suits button clicks or orders with changing values. You can also set it up through Google Tag Manager if your site already uses it.
Most settings can stay as they are. A few are worth checking before you finish. These are the ones to look at:
- The conversion name, so your team can tell actions apart at a glance
- The value, which helps when some actions are worth more than others
- The count setting, which controls how repeat actions by one person are recorded
- Whether the action is primary or secondary
Primary actions are used for bidding. Secondary actions are for observation only. Google describes getting this right as critical. If a minor action such as a page view is set as primary, automated bidding may chase the wrong goal.
Thank you pages and your website
The URL method depends on a clean thank you page. Each form should send people to a page they can only reach after submitting. If that page is linked in your menu or indexed by search engines, casual visitors may trigger false conversions. A quick check of your site structure avoids this.
This is one place where web design and marketing overlap. A clear form, a fast page and an obvious next step all lift the number of people who convert. Tracking then shows you whether those design changes are working. The two improve together.
Online stores have extra options. Order values can be passed through the tag so you can see revenue rather than just order counts. Our guide to attracting converting traffic to a WordPress store covers the site side of the same problem. Good tracking tells you which of those visitors came from paid ads.
Checking that tracking works
After setup, go back to Goals and find your action in the conversion actions table. The Status column in that row shows whether the tag is recording. A new action can take a little time to show activity. If it stays inactive, something in the setup needs attention.
Google suggests its Tag Assistant tool for checking a Google tag. If you use Tag Manager, its own troubleshooting guide applies. A simple test is to submit your own form and look for the result. Do this whenever your site or forms change.
Consent also matters. Google’s guidance says you should give clear information about data collection on your site. It also says to get consent where required by law or Google policy. Your privacy policy should mention the cookies your ads and analytics use.
Using the data to improve campaigns
Once conversions flow in, you can compare keywords by cost per conversion rather than cost per click. A cheap click that never converts is not a bargain. A more expensive keyword that brings steady enquiries may deserve more budget. This is where tracking pays for itself.
Our earlier article with tips for successful AdWords campaigns still applies to ad writing and structure. Conversion data simply tells you which of those campaigns earn their keep. Review it monthly at a minimum. Pause or rework anything that spends without results.
Conversion reports also feed your keyword research. Search terms that convert well often point to new phrases worth targeting. You can use the same thinking when finding keywords you can easily rank for in organic search. Paid data and organic planning work best side by side.
Frequently asked questions
Do I need a developer to set up conversion tracking?
Not always. The URL method needs no code if you already have a thank you page. Button clicks and order values usually need the code method or Tag Manager. A developer can help if you are unsure.
Can I track phone calls from my ads?
Yes. Phone calls are one of the conversion types Google Ads supports. You create a separate conversion action for calls. That keeps calls apart from form enquiries in your reports.
Why do my conversion numbers differ from my own records?
Some conversions cannot be observed, often because of browser cookie settings. Google uses modelled conversions to estimate part of that gap. Your own sales records will rarely match exactly. Look for trends rather than perfect counts.
What is the difference between primary and secondary actions?
Primary actions are used for bidding decisions. Secondary actions are tracked for observation only. Set your most valuable actions as primary. Leave minor steps as secondary.
Conversion tracking turns Google Ads from a guess into a measured channel. Start with the one or two actions that matter most to your business. Set it up once, check it after any site change and let the numbers guide your budget.