Most Google Ads accounts track only one thing: the final lead or sale.
Those outcomes should remain central. Recording useful earlier actions separately can help you understand the enquiry journey without treating every interaction as a lead.
That is where secondary conversions come in.
Secondary conversions let you track the meaningful actions people take on the way to becoming a customer, without confusing your main performance data.
Used properly, they add context to reporting and help you investigate user behaviour. They do not automatically become Smart Bidding goals.
Key takeaways
- Secondary conversions in Google Ads are recorded and shown in the All conversions column but are not used for bidding, while primary conversions are used for bidding and optimisation.
- A secondary conversion action included in a custom goal is still used for bidding when a campaign uses that custom goal, even though the action is marked secondary.
- To make a conversion secondary, open the conversion action under Goals and set Action optimisation to Secondary, keeping the main lead or sale as Primary.
- Good secondary conversions show commercial intent without being the final goal, such as phone number clicks, form starts, pricing page views, brochure downloads, add to cart or begin checkout.
- Secondary conversion data helps diagnose the enquiry journey, but qualified lead or sales data is still needed before changing budgets or judging which traffic is more valuable.
What Is a Secondary Conversion?
In Google Ads, every conversion action has a role:
- Primary conversions are used for bidding and optimisation
- Secondary conversions are recorded, but not used for bidding
A secondary conversion is simply a valuable action that shows intent, but is not the final business goal.
Google still records them.
You still see them in reports.
You can still analyse them and use them to diagnose problems.
Under standard goals, secondary actions are observation-only and appear in the All conversions column. There is an exception: an action included in a custom goal is used for bidding when the campaign uses that goal, even if the action is marked secondary. See Google’s conversion goal guidance.
That is the key difference.
Why Primary Only Tracking Is Not Enough
Most businesses track only things like:
- Lead form submissions
- Purchases
- Booked calls
Those are essential, but they happen late in the journey.
Additional actions you may want to observe separately include:
- Who engaged with your pricing
- Who started a form
- Who clicked to call
- Who downloaded a brochure
- Who watched your demo
These actions help you investigate where potential customers engage or leave the journey. Low conversion volume is not, by itself, a reason to optimise bidding towards weaker actions.
Secondary conversions give you additional reporting context; they do not prove lead quality or directly supply extra bidding goals under standard goals.
Examples of Secondary Conversions
These vary by business, but good secondary conversions usually include actions that show commercial intent.
For Lead Generation
- Clicks on phone numbers
- WhatsApp or live chat opens
- Form start
- Form step 2 or 3
- Pricing page views
- Brochure or PDF downloads
- Booking calendar views
- “Contact us” page views
For Ecommerce
- Add to cart
- Begin checkout
- Product page views
- Email signups
- Wishlist adds
- Shipping or payment step reached
For B2B
- Case study downloads
- Whitepaper downloads
- Pricing page views
- Demo page visits
- Video views of product demos
The rule is simple.
If it indicates buying intent but is not the final sale or lead, it belongs as a secondary conversion.
How Secondary Conversions Help You Understand Your Account
They help in three main ways, all on the reporting and diagnosis side rather than bidding.
1. Keep reporting separate from bidding goals
Use primary actions and campaign goals deliberately so bidding reflects the business outcomes you want.
Secondary actions can show earlier engagement in reports without making that engagement the campaign’s optimisation target.
Adding observation-only actions does not automatically improve Smart Bidding or accelerate learning. Their immediate value is helping you diagnose the journey.
That leads to:
- Visibility of form starts and other early actions
- Separate reporting for enquiries and supporting interactions
- Evidence to investigate conversion friction
Treat these as diagnostic measures and compare them with qualified leads or sales before changing budgets.
2. Cleaner Performance Analysis
With secondary conversions in place, you can answer questions like:
- Which keywords drive high-intent users, even if they do not convert yet
- Which campaigns attract researchers versus buyers
- Which ads get people to engage but not commit
That lets you optimise properly instead of guessing.
3. Better Budget Decisions
You are less likely to cut campaigns that look weak on final conversions but show strong engagement, as long as you check that engagement against qualified leads or sales first.
And you stop scaling campaigns that only generate low-quality clicks.
This is where many accounts quietly lose money.
How to Set Up Secondary Conversions
The setup has two parts.
Step 1: Create the Conversion in GA4 or Google Ads
You track the action just like any other conversion:
- Button clicks
- Page views
- Form steps
- Downloads
- Events
These are normally set up in GA4 or Google Tag Manager, then imported into Google Ads.
Step 2: Mark It as Secondary in Google Ads
Inside Google Ads:
- Go to Goals
- Open Conversions
- Click the conversion action
- Set Action optimisation to Secondary
Finally, check the campaign’s conversion goals. A secondary action included in a custom goal used by that campaign can still be used for bidding.
With standard goals it remains available for observation in All conversions, without becoming a bidding target.
Your main lead or sale stays as Primary.
What Should Be Primary vs Secondary?
A simple rule works for almost every business.
Primary Conversions
- Purchases
- Qualified lead forms
- Booked calls
- Trial signups
These represent real business outcomes.
Secondary Conversions
- Engagement
- Intent
- Micro-commitments
They support analysis and diagnosis, not bidding or success reporting.
If you would celebrate it on a revenue report, it should be primary.
If it just shows interest, it should be secondary.
An Illustrative Example
Imagine two keywords:
| Keyword | Leads | Phone Clicks | Form Starts |
|---|---|---|---|
| luxury matchmaking london | 2 | 18 | 24 |
| dating agency free | 3 | 0 | 1 |
Without secondary conversions, the second keyword looks better.
With secondary conversions, the first keyword shows more supporting interactions, but qualified-lead or sales data is still needed to judge which traffic is more valuable.
That changes where you look when you review the account.
Why Most Google Ads Accounts Get This Wrong
Most tracking setups are built to count the final result, not to explain how people got there.
They only track what is easy, not what is useful.
That leads to:
- Incomplete reporting of the enquiry journey
- Confusion between engagement and business outcomes
- Missed opportunities
- Misleading reports
Secondary conversion reporting can help diagnose these gaps. Bidding still needs suitable primary actions and campaign goals.
Related guides: Conversion Actions in Google Ads (What They Are and Why They Matter) and Google Ads Showing No Recent Conversions? Here’s What to Check First.
Final Thought
If you want to run Google Ads like a serious marketing system rather than a traffic tool, you need to see how users behave before they convert.
Secondary conversions give you that visibility.
They do not replace real conversions.
They support them.
And when used properly, they make it much easier to spot where the journey is breaking down and what to fix.
I’m a Hampshire PPC consultant.
Need help with your Google Ads?
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