We went back through 66 Google Ads accounts, 76 audits in all. The first thing we look at is almost never the campaigns. It's the conversion actions, because everything downstream is built on top of them.
Here is what we keep finding: the account is measuring things. Numbers are going up. There is a column with conversions in it and the number is not zero. And the algorithm is spending the budget going after the wrong people, on purpose, because that is exactly what it was told to do.
Nobody meant to do this. It happens through a single setting most owners have never been shown.
"Primary" Isn't a Label. It's a Steering Wheel.
Every conversion action in your account is either primary or secondary. It looks like a filing decision. It isn't.
Primary actions feed Smart Bidding. When you run Maximize Conversions, Target CPA, or Target ROAS, the algorithm studies the people who completed your primary actions, builds a picture of what those people look like, and then goes hunting for more of them. It bids up on the ones who resemble your converters and bids down on the ones who don't.
Secondary actions do none of that. They report into the "All conversions" column so you can watch them, and that is the whole job. They are a rear-view mirror, not a steering wheel. It is the first thing we check on every Google Ads account we look at, before campaigns, before keywords, before budget.
So the question that setting is really asking is not "how should I categorize this?" It is: which customers do you want more of? Google will take the answer literally.
Conversion tracking is food for the algorithm. What you mark primary is the recipe.
One wrinkle worth knowing, because it catches people who think they have already fixed this: if a secondary action is included in a custom goal, and that custom goal is being used for bidding, then it does feed bidding after all. Demoting an action to secondary is not always enough on its own. If you have custom goals in the account, check what is inside them.
Google Will Go Find You More People Who Add to Cart and Leave
The most common version of this is an ecommerce account where add-to-cart is set as a primary conversion.
It sounds harmless. Add-to-cart is a real signal, it is a step toward a sale, and it feels good to see a big number. But think about what you just told the algorithm to optimize for. Not purchases. Add-to-carts.
Google will literally go find people who add to cart and don't buy. Those people are cheaper to reach and easier to find than buyers, so an algorithm rewarded for add-to-carts will drift toward them. It is doing its job perfectly. You gave it the wrong job.
In one supplement account we audited, add-to-cart and begin-checkout were both set as primary alongside purchases. Three actions competing to define what a good customer looks like, and two of them describing someone who leaves.
We have seen the same pattern with:
- Page views as a primary conversion. A tile retailer had this running. The algorithm's target customer became someone who loads a page. That describes almost everyone, including everyone who bounces.
- Map directions and ad clicks as primary. An RV internet company had both. Directions have genuine business value, especially for a storefront. That does not make them the thing you want Smart Bidding chasing.
- Newsletter signups and guide downloads as primary. Real value, wrong altitude. These belong in secondary, where you can watch them without letting them steer.
The test is simple. Ask whether the action, on its own, represents money in the business. A purchase does. A booked appointment does. A qualified phone call does. Someone reaching step two of a five-step checkout does not.
Everything that fails the test still deserves to be measured. It just belongs in secondary, where you can learn from it without handing it the wheel.
Your Best Conversions Are Riding in the Passenger Seat
The mirror image is just as common and does more damage, because from the dashboard everything looks fine.
We audited an account where the phone calls and the contact form submissions, the only two things that actually made the business money, were both sitting as secondary. They were being counted. They showed up in reports. The owner could see them. And Smart Bidding was receiving nothing from them at all.
That account was running an automated bid strategy with effectively no fuel. Google was optimizing against whatever thin signal it could find, while the real evidence of what a good customer looked like sat one column over, marked "observation only."
If your form fills and calls are coming in as secondary conversions, you are not optimizing the algorithm at all. You have automated bidding switched on and nothing meaningful pointed at it.
Almost nobody does this deliberately, which is why it survives so long. It happens three ways:
- Google classified it that way and you never looked. Actions arrive with a default classification based on category. A lead form action does not automatically land in primary.
- Somebody demoted it during a cleanup. An account gets tidied, the conversions column looks inflated, and the fix is to demote things until the number looks believable. Reporting improves. Bidding quietly loses its fuel.
- It was set up before automated bidding was turned on. Under manual CPC, primary versus secondary changes almost nothing you can feel. Switch to Target CPA a year later and that dormant setting suddenly becomes the most important one in the account, with nobody thinking to revisit it.
The cost is not subtle. An account in this state is paying automated-bidding prices for manual-bidding intelligence. Google is making thousands of bid decisions an hour on a definition of success that excludes the only outcomes you care about.
Here is the check, and it takes about ninety seconds. Open your conversion actions and sort by the primary/secondary column. Now find the row that represents how customers actually reach you. For a chiropractor that is a booked appointment or a phone call. For a manufacturer it is a quote request. For an ecommerce store it is a purchase. If that row says secondary, you found it.
Google Adds Conversion Actions You Never Asked For
Some of what is in your conversion list, you did not put there.
Link a YouTube channel, a Play Store account, or a Google property, and Google can create conversion actions on its own. In a 2026 audit of a rehabilitation equipment manufacturer, the account contained an Android app install action and a YouTube-hosted action. The company does not have an app. One of them was set as primary.
It gets worse than passive. When Google restructured how conversions were categorized, it reclassified existing accounts' actions for them, deciding on the owner's behalf which ones counted as primary and which as secondary. Some accounts came through that change with a different definition of success than they went in with, and nobody sent a notice.
This is not a conspiracy. It is just whose interest the defaults serve. Google's defaults are built for the average of millions of accounts, and your account is not the average of millions of accounts.
The habit worth building: treat the conversion actions list as something to audit on a schedule, not something to set once. Open it quarterly. For every action, ask three questions. Did I create this? Do I want it? Should it be steering?
Anything you cannot explain the presence of should be demoted to secondary until you can.
The Phone Call You Never See
For service businesses this is the biggest gap we find, and it is one of the most common gaps we see in service accounts.
There are two completely different phone call conversions in Google Ads, and accounts routinely have one and not the other.
Calls from ads are the ones placed directly from the call asset on your ad. Someone taps the phone number in the search result and never reaches your site. Most accounts track these, because it works out of the box.
Calls from the website are the ones where someone clicks your ad, lands on your site, reads for a minute, and then calls the number in your header. Same ad. Same money. Frequently the more serious buyer, because they did their homework first. And in a large share of the accounts we audit, these are invisible.
That is not a rounding error. For a home services company or a medical practice, the website call is often the main event. If it is untracked, the algorithm never learns which keywords produce real phone calls. You are optimizing on a fraction of your own results.
There is a catch that surprises people when they go to fix it. Google's built-in website call tracking works by swapping the number on your page with a Google forwarding number, and it can only swap one number per page. If your ads point at a dedicated landing page, this is worth settling before you send another dollar of traffic to it.
The rehab equipment manufacturer had a sales number, a support number, and an 800 number on a single contact page. Google can handle exactly one of those. The other two calls happen and vanish.
If you have one phone number, Google's built-in tracking is free and fine. Turn it on. If you have multiple numbers, or you need to keep your own numbers visible for brand reasons, or you want to record and score calls by quality, that is when a dedicated call tracking platform earns its cost. Those tools handle number pools and can pass call data back into Google Ads as a conversion.
One more thing to check while you are in there: call duration. A conversion that fires on a two-second call is measuring wrong numbers and hang-ups. Thirty seconds is a reasonable default threshold for most businesses, because a real inquiry lasts longer than that and a voicemail is still a real lead.
Tracking Doesn't Break Loudly. It Just Stops.
Conversion tracking is not a thing you set up. It is a thing that decays.
A site gets redesigned. A thank-you page URL changes. A form plugin updates. A developer moves a tag. None of these events produce an error message in Google Ads. The account keeps running, keeps spending, and quietly stops learning.
In one electronics manufacturer's account, we opened the conversion actions view and found nearly every action flagged "needs attention" or "no recent conversions." Zero conversions recorded in ninety days. The campaigns had been running the entire time.
Ninety days of spend with no feedback loop is not just wasted measurement. Smart Bidding was still operating, still making decisions, working from data that had stopped arriving.
A related failure hides even better. We tested the contact form on a sculptor's website during an audit and the form submitted successfully, then simply reloaded the same page. No thank-you page, no confirmation URL, nothing that could ever be used as a trigger. The form worked perfectly for the visitor. There was never anything there to track.
Two habits fix nearly all of this:
- Read the status column. Open Goals, then Conversions, then Summary. Every action shows a status. "Recording conversions" is what you want. "Needs attention," "Inactive," or "No recent conversions" on an action you rely on means it is broken right now.
- Submit your own form once a month. Fill it out. Call your own number from a phone that is not in your office. Then look for it in the account tomorrow. It takes five minutes and it is the only test that proves the whole chain works end to end.
Twenty Minutes to Know Where You Stand
You do not need to be a mechanic to own a car, but you should know how to check the oil. Here is the oil check.
1. Open your conversion actions. Tools, then Goals, then Conversions, then Summary.
2. Read the status column first. Anything showing "needs attention," "inactive," or "no recent conversions" is either broken or obsolete. Fix it or archive it, but do not leave it sitting there.
3. List what is marked primary. Write them out. For each one ask: does this, by itself, represent money in the business? If not, it belongs in secondary.
4. List what is marked secondary. Is your most valuable action hiding in here? Calls and form fills marked secondary is the single most expensive misconfiguration we find.
5. Check your custom goals. If any campaign uses a custom goal, open it and look at what is inside. A secondary action in a custom goal used for bidding is still steering.
6. Find anything you did not create. App installs, YouTube-hosted actions, anything auto-generated. Demote it to secondary unless you have a specific reason to keep it.
7. Confirm you have both call conversions. Calls from ads and calls from the website are separate things. Most accounts have the first. Fewer have the second.
8. Count the phone numbers on your landing pages. More than one on a page means Google's built-in call tracking is only catching a fraction.
9. Test it yourself. Submit the form. Make the call. Check tomorrow.
If steps three and four turn up problems, fix those first. Changing what is marked primary will move your results more than any bid adjustment or new ad copy, because it changes what the algorithm is hunting for.
Expect a wobble after you make changes. Smart Bidding has to relearn against the new definition of success, and that takes a couple of weeks. That is the system recalibrating toward the right target, which is a very different thing from performance getting worse.
The Part Nobody Tells You
The reason this is so common is not that owners are careless. It is that a misconfigured conversion setup does not look like a problem. It looks like a working account. There are numbers in the conversions column, the graphs have shape, the reports generate. Everything is fine, except the algorithm is quietly getting better and better at finding people who will never buy from you.
Every account we audit gets checked here first, before anything else, because a beautifully structured campaign pointed at the wrong definition of success is just an efficient way to waste money.
We do this all day long. If you would rather spend your time running your business, we can take it off your plate. If you would rather learn it yourself, go run the twenty-minute check above, because it costs nothing and it is where the money is. Either way, we are glad to help.
