Google Ads Conversion Tracking: How I Set It Up Before Touching Bids

Last updated: 7 November 2026

Google Ads conversion tracking is the part of an account that tells Google which clicks turned into sales, leads or calls. If it counts the wrong thing, every bid change after it pushes the account the wrong way. Here is how I set it up, how I check it, and why it is the first thing I look at before I touch bids.

Quick Answer: How does Google Ads conversion tracking work?

Google Ads conversion tracking records a valuable action, such as a purchase, lead form or call, after someone interacts with your ad. A tag reports it, either placed on the page, fired through Google Tag Manager, or imported from GA4. Primary actions are used for bidding, while secondary actions are for observation. Check this before changing any bids.

Each setup route works, but each one has a trap worth knowing before you choose.

Source: Google Ads Help on GA4 key event import, Tag Manager Help on the conversion linker, MiKi Jewellery case study.

Why do I check conversion tracking before changing bids?

I check tracking first because bidding can only chase the conversions you feed it. Google Ads uses primary conversion actions for bidding, and Google calls setting primary and secondary correctly critical for Smart Bidding. If a page view or a duplicate purchase sits in that primary set, the bid strategy learns to buy more of it.

So my order in any account stays the same. Tracking comes first, then structure, then search terms and negatives, then bids. It is the order I follow in a full Google Ads audit, because a bid change made on bad data cannot be judged fairly.

Timing is the other reason. Google suggests allowing one to two conversion cycles for Smart Bidding to adapt after big changes in conversion behavior. Before I move an account to target ROAS, I want about 30 days of stable ROAS, and those days only count if the tracking behind them was right.

What should count as a conversion in Google Ads?

Count the actions that make the business money: a purchase with its value, a qualified lead, or a real sales call. Google suggests a separate conversion action for each type, such as one for purchases and one for calls. Softer actions, like page views or add to cart, can still be tracked as signals.

Which actions should be primary and which secondary?

Make an action primary only when you would happily pay for more of it. Primary actions show in the Conversions column and are used for bidding when their goal is used for bidding. Secondary actions show only in All conversions and are for observation. One exception: actions in a custom goal are used for bidding whether they are primary or secondary, as the primary and secondary help page explains.

Watch for doubles. If your Google Ads purchase tag is primary and an imported GA4 purchase is also primary, one sale can be counted twice. Keep one primary source for each outcome and leave the other as secondary, so you can still compare them side by side.

Should you use the Google tag, Google Tag Manager or a GA4 import?

Any of the three can work, as long as one clean source feeds bidding. The right pick depends on who controls the site code and how many tags you run. Here is how each one behaves.

When does the Google tag on the page make sense?

Placing the Google tag directly on the page suits a simple site with one fixed thank-you page. The downside is that every change needs someone with code access. On a site with several forms, buttons and checkout steps, that gets slow to manage and hard to test.

Why use Google Tag Manager for conversion tracking?

Google Tag Manager keeps every tag in one container that you can preview before it goes live. You add a Google Ads Conversion Tracking tag, paste the Conversion ID and Conversion Label, and pick a trigger. The Tag Manager help page notes that the Conversion ID is unique to the account, while the label is unique to each conversion action.

It also helps when you run more than one ad platform. I run Microsoft Ads UET tracking through Google Tag Manager as well, so one container holds the tags for both platforms and one preview session tests them.

What changes when you import GA4 key events?

Importing GA4 key events works well when GA4 already tracks clean events, but the defaults catch people out. Conversions created from Google Analytics start as secondary, so they will not drive bidding until you change them to primary in Google Ads. When attribution is set to Paid and organic channels, the count and click-through window follow the GA4 settings, according to Google’s import guide.

Values need care too. GA4 must send the value as a number for Google Ads to report it. If you plan to use value-based bidding, place a few test orders and compare them with your store records before you trust the import.

How do you set up Google Ads conversion tracking in Google Tag Manager?

Create the conversion action in Google Ads first, then build a matching tag and trigger in Tag Manager. This is the order I follow:

1. In Google Ads, go to Goals, then Conversions, then Summary, and create a website conversion action with its value and count setting.
2. Open the action, choose Use Google Tag Manager, and copy the Conversion ID and Conversion Label.
3. In Tag Manager, add a Google Ads Conversion Tracking tag and paste both values.
4. Use variables for conversion value, transaction ID and currency instead of fixed numbers.
5. Set a trigger that fires only when the action is complete, such as the order confirmation page.
6. Make sure a conversion linker tag or a Google tag loads on every page people can land on.
7. Test in Preview mode with Tag Assistant, then publish the container.

Two fields deserve extra care. If the value field is empty, Tag Manager sends the value as zero, and a transaction ID read from the data layer helps prevent duplicate conversions (Tag Manager Help). The conversion linker stores ad click details in first-party cookies on your domain, so a later conversion can link back to the click.

How should you count sales, leads and calls?

Count sales with “Every” and leads with “One”. Every records each conversion after an ad interaction, which fits sales because each order adds value. One records a single conversion per ad click, which fits leads because three forms from one person are still one lead, as Google’s counting options page explains.

You can mix both settings in one account. A change only applies to future conversions, not past data. The defaults also vary by action type, so check each action rather than assuming.

Here is the count setting that fits the most common actions.

Source: Google Ads Help, About conversion counting options.

What have I found when checking tracking in real accounts?

In the published case studies, the tracking review comes before budget and bid changes. Three accounts show why.

What changed in a sign company account once the conversion goal was right?

In a local signage account, the rebuild included a conversion tracking review. We confirmed that bidding optimized toward qualified leads and purchases, not form views or low-value micro-conversions. Alongside search term, structure, Performance Max and landing page work, ROAS went from 1.5x to 7.35x within the first month (signage case study).

I do not credit that result to tracking alone. Budget only moved to campaigns showing signal once the data was clean, and clean data started with the right goal.

Why does a wine store’s conversion count show decimals?

The CANA Wine Company account reports conversions with decimals, which is expected. The CANA case study explains that more than one conversion action is counted and some conversions are modeled rather than observed. Data-driven attribution, the default for most actions, also splits credit across ad interactions.

So those figures are Google’s attribution, not deduplicated revenue. On that basis, the account recorded $177,209 in conversion value from $10,214 of spend over 120 days (published results).

How does a new Shopify store pass order values to Google Ads?

For MiKi Jewellery, a new Shopify store, tracking counts Shopify purchases with their order value. The Google and YouTube app maps purchase, add to cart and checkout started events to Google Ads conversion actions (MiKi Jewellery case study). Value-based bidding can only work toward the values it is sent.

So check which mapped event is primary. If add to cart bids alongside purchases, Performance Max can chase carts instead of orders. That account reached 7.81 conversion value per cost in its first 47 days (case study).

How do you check that conversion tracking is working?

Start with the Status column on the Summary page under Goals. Google now uses five statuses: Active, Needs attention, Misconfigured, Awaiting conversions and Removed, as listed in its status troubleshooter. Active means conversions are recording normally. Misconfigured means recording has stopped, usually because of a setup error or a broken tag.

Awaiting conversions means nothing was recorded in the last seven days. Google lists three likely causes: the action is less than 48 hours old, the campaigns are paused, or traffic is too low. Needs attention means there are issues to fix, but recording has not fully stopped.

How do you test a conversion action with Tag Assistant?

Launch Tag Assistant from the conversions summary table and complete the action on your site. Enter a landing page or home page rather than the conversion page itself, then walk through to the conversion. Verified actions from a debug session show in Google Ads after about 30 minutes, according to Google’s Tag Assistant guide.

If you use Tag Manager, you may need to choose Debug live version first. Google also suggests confirming that the container snippet is on all pages, and that the conversion linker and conversion tags fire on the right triggers.

Why do Google Ads and GA4 show different conversion numbers?

They differ because each tool counts and credits conversions its own way. Google Ads credits its own ad interactions and uses data-driven attribution by default for most actions. GA4 reports across all your channels, and an imported key event can take its count and window from GA4 settings.

Other ad platforms add a third view. In a Judaica store account, the case study notes that Google Ads and Meta Ads values are not deduplicated against each other. Adding them together double counts some orders. The useful comparison is each platform against the store’s own order records.

Where do enhanced conversions fit in?

Enhanced conversions come after basic tracking works, not instead of it. They add hashed first-party data, such as an email address, to your conversion tag so Google can match more conversions to ads. I cover web versus leads, setup and the checks I run in my guide to Google Ads enhanced conversions.

The order still matters here. If the base tag fires on the wrong page or counts twice, enhanced conversions will simply match those wrong conversions more often. Fix the action first, then add the extra data.

FAQs

Can you run Google Ads without conversion tracking?

You can run ads, but you cannot judge cost per lead or return on ad spend, and conversion-based bid strategies have nothing to learn from. You also cannot tell good search terms from wasteful ones. I set up and test tracking before I change any bids.

How long does Google Ads conversion tracking take to start working?

A tested action can show as verified about 30 minutes after a Tag Assistant session. After that, the status depends on real conversions. An action created less than 48 hours ago may show Awaiting conversions until people start converting through your ads.

Should GA4 conversions be primary in Google Ads?

Only if GA4 is your single clean source for that outcome. Conversions created from Google Analytics start as secondary, so they do not drive bidding until you change them. If a Google Ads tag already tracks the same purchase as primary, keep the GA4 version secondary.

What is the conversion linker tag in Google Tag Manager?

The conversion linker stores ad click details from the landing page URL in first-party cookies on your domain. When a conversion tag fires later, it uses that data to link the conversion to the click. You do not need it if a Google tag already loads on every page.

Why are my Google Ads conversions shown as decimals?

Decimals usually come from attribution and modeling. Data-driven attribution shares credit for one conversion across several ad interactions, and some conversions are modeled rather than observed. On its own, a decimal in the Conversions column is not a sign of a tracking fault.

Do I need enhanced conversions for conversion tracking to work?

No. Basic conversion tracking works without them. Enhanced conversions add hashed customer data, such as an email address, to help Google match more conversions to ads. Turn them on once the base tag counts the right action, not as a repair for a broken one.

What should you do next with your conversion tracking?

List the actions that are primary today and ask whether each one is a real sale or lead. Then check the count setting, the value and the status for each one. If that list surprises you, fix it before you change bids, budgets or campaign types.

I have worked in paid search since 2013, and tracking is the first thing I check in every audit. If you then want me to run the account, my fee is $600 to $800 per platform a month, month to month, with ad spend paid to Google and the account in your name. You can hire a freelance Google Ads specialist here, or read more Google Ads guides on the blog.

How this post was written: drawn from Ishant Sharma’s own account work and the published case studies linked above, researched against current Google Ads documentation, drafted with AI assistance and checked against the sources before publishing.