Google has quietly rewritten much of its Google Ads conversion measurement help documentation. Search Engine Roundtable published a side-by-side comparison of the new and old versions on July 27, 2026, and the additions are substantial. Nothing about how Google Ads behaves changed. What changed is that Google now spells out, in its own support pages, the setup mistakes that keep Smart Bidding from working.
Worth being clear about that up front: this is a documentation change. Not an algorithm update, not a new feature, nothing to wait for or switch on. The value sits in the text itself, which reads a lot like an audit checklist for a conversion setup.
What Google added to the conversion measurement doc
According to Search Engine Roundtable's comparison, the new material clusters around four things: how Smart Bidding learns, who needs what access, where conversion data should come from, and how to read the status of a conversion action.
The learning phase is 7 to 14 days, and edits restart it
The documentation now states that Smart Bidding strategies go through a standard learning phase of 7 to 14 days. It also warns that frequent manual changes during that window reset the learning period and delay optimization. The changes it names are budgets, CPA or ROAS targets, and conversion goals.
Anyone who has watched an account get adjusted daily by a nervous stakeholder knows where this ends up. The strategy never finishes learning, performance stays poor, and the poor performance is read as a reason to intervene again.
Access rights, key events, and a 24 to 48 hour delay
To import conversions from Google Analytics, the doc now says you need Admin access in Google Ads plus Edit access on the linked Google Analytics property. Only events marked as key events in Google Analytics are eligible for import. And after linking accounts or marking a key event, it can take 24 to 48 hours before the import options appear at all.
That last detail settles a familiar argument. An empty import list an hour after linking is not proof that something is broken.
Analytics or the Google tag
The doc now guides advertisers through picking a data source: Google Analytics, or the Google tag. Where an advertiser needs features specific to Google Ads, with enhanced conversions given as the example, it recommends the Google tag.
Primary, secondary, and the Unverified status
Two clarifications deserve more attention than they will get. Conversion actions marked primary are biddable; secondary ones are observation-only. Set them the wrong way round and Smart Bidding has nothing to optimize toward, which the documentation now says in plain words. Separately, a tag status of "Unverified" or "Inactive" is normal until the first conversion or a test event is recorded, so that label on its own is not evidence of a broken tag.
Why a help-page edit matters more than it sounds
Look at what is on that list. Goals sitting in the wrong column. Analytics events nobody ever marked as key events. Targets nudged every other day while a strategy is still learning. None of these throw an error. Spend continues, reports populate, and the numbers look plausible enough that nobody digs.
Having Google state the rules in writing changes the conversation with a client or a manager. "Leave the targets alone for two weeks" holds up better when it sits on a support page instead of being presented as one practitioner's opinion.
An audit checklist drawn from the new text
- List every conversion action and confirm which are primary and which are secondary. Anything biddable that should not be biddable is distorting the bid right now.
- Check that the Analytics events you rely on are actually marked as key events.
- Confirm Admin access in Google Ads and Edit access on the Analytics property before troubleshooting an import that will not appear.
- After linking accounts or marking events, wait 24 to 48 hours before deciding the link failed.
- Pick the data source deliberately. If you need enhanced conversions, the doc points to the Google tag.
- Freeze budgets and targets for the first 7 to 14 days of a new bidding strategy.
What this means for Thai marketers
Conversion-goal hygiene is the weak point in a lot of lead-generation accounts. Goals accumulate: one from the old website, one from a form plugin that was replaced, a phone-click action added during a promotion, an imported Analytics event that duplicates a tag-based one. Old actions rarely get removed, and several of them end up marked primary. Bidding then optimizes toward a total that counts the same lead more than once, which is a slower and more expensive failure than a tag that simply stopped firing.
The same pattern shows up in ecommerce accounts, where a tag-based purchase action and an imported Analytics purchase event both sit as primary and double the reported revenue. A count that is correct beats a count that is large. If your Analytics setup and your Ads conversion actions have never been reconciled against each other, that reconciliation is the job the new documentation is describing.
Common questions
Is this a Google Ads algorithm change?
No. It is an update to Google's help documentation. Search Engine Roundtable compared the new and old versions and found numerous additions. The behaviour described was not announced as new.
How long does Smart Bidding take to learn?
The documentation gives a standard learning phase of 7 to 14 days, and warns that manual changes to budgets, CPA or ROAS targets, or conversion goals during that period reset it.
Why do my Analytics conversions not show up for import?
Three documented reasons: missing Admin access in Google Ads or Edit access on the Analytics property, events that were never marked as key events, or not enough time, since it can take 24 to 48 hours after linking or marking.
Conversion setups drift. If nobody has read yours end to end since the day it was built, the new documentation is a decent excuse to do it this week, and the team at Relevant Audience can take that off your desk.
