A secondary conversion action in Google Ads never steers bidding. It's recorded, it shows in the All conversions column, and Smart Bidding ignores it for optimization. Switch it to primary and you've changed what the campaign bids toward, which Google treats as a goal change: a Learning status for up to 7 days and, in most cases, 1 to 2 conversion cycles before performance settles.
So the time to decide which steps bidding should chase is before the campaign starts. A month as secondary is a month bidding wasn't chasing that action.
What secondary really means
Google describes secondary actions as observation only. They aren't used for bidding, even if the goal they belong to is used for bidding. The one exception is a custom goal: put a secondary action in a custom goal the campaign uses and it counts for bidding.
Primary has a condition too. A primary action only drives bidding if the campaign uses the goal that contains it. Both have to be true, which we cover in primary vs secondary conversion actions.
The question from the call
On a mentoring call, a marketer working on a SaaS account walked us through its signup flow: register, set up the account, choose a plan, then add a card to start a 14 day free trial. The card is charged at the end of the trial unless the user opts out.
Our advice was to keep the setup steps out of bidding, since they're part of onboarding. The steps worth bidding on were the ones that show real intent: someone adding a card, someone still there after the 14 days, and a demo request. The marketer asked whether those should be primary or secondary. Our answer: primary, because secondary is data collection. And if the customer who stays past the trial matters more than the one who only adds a card, give the actions values and move from Maximize conversions to Maximize conversion value. Google says Maximize conversions goes for the most conversions regardless of value, so values only steer value-based bidding.
Google's own default advice is narrower: if several goals track stages of one funnel, make only one of them the account-default goal. We cover when several valued actions are worth it in Smart Bidding can't tell a demo from a signup.
If you switch later
Changing an action's primary or secondary setting is on Google's list of goal changes. Google says Smart Bidding learns from historical and new conversion data and never starts from scratch when the account has past conversion data. It doesn't say how much weight an action's secondary history carries, and it still asks for 1 to 2 conversion cycles after any goal change. So plan for the adjustment.
- Set the budget first. Google advises having budgets at the amount you intend to spend before changing conversion tracking.
- Make it one change. Switch everything you plan to switch at once, then leave it. Ads keep serving while the status shows Learning.
- Count the cycle honestly. A conversion that can only happen when a 14 day trial ends takes at least 14 days from click to conversion. Two cycles of that is a month or more.
- Judge it over the right window. Google recommends 2 conversion cycles or 2 weeks, whichever is longer, after the strategy converges, allowing for conversion delay.
The takeaways
- Secondary conversion actions are observation only. They don't steer bidding unless they're in a custom goal.
- Switching an action to primary is a goal change: up to 7 days of Learning status and 1 to 2 conversion cycles to settle.
- Google doesn't document how much the secondary history helps, so don't count on it to skip the adjustment.
- Decide which funnel steps are primary at setup. If several matter, value them and use Maximize conversion value.
- Make the switch once and judge it over 2 conversion cycles or 2 weeks, whichever is longer.
Common questions
Does a secondary conversion action affect Smart Bidding?
No. Google says secondary actions are for observation only: they report in the All conversions column and aren't used for bidding, even if their goal is used for bidding. The one exception is a secondary action inside a custom goal the campaign uses.
What happens when I change a conversion action from secondary to primary?
Google lists changing an action's primary or secondary setting as a change to your conversion goal. The bid strategy can show a Learning status for up to 7 days while ads keep serving, and Google says Smart Bidding takes 1 to 2 conversion cycles in most cases to adapt.
Will Smart Bidding use the conversions recorded while the action was secondary?
Google doesn't say specifically. It says Smart Bidding learns from historical and new conversion data and never starts from scratch when the account has past conversion data, but it still asks for 1 to 2 conversion cycles after a goal change. Don't plan on the secondary history skipping that.
How long should I wait before judging the switch?
Google recommends letting the strategy converge for 1 to 2 conversion cycles, then evaluating over 2 conversion cycles or a 2 week window, whichever is longer, allowing for conversion delay.
Should every funnel step be a primary conversion action?
Not by default. Google recommends only one account-default goal when several goals track stages of the same funnel. If you want bidding to use several steps, give each a value that reflects its worth and use Maximize conversion value, since Maximize conversions counts conversions regardless of value.