Google Ads changed one of its core support pages and never said so. The page governs conversion measurement, hosted at support.google.com/google-ads/answer/1722022, and it now carries several paragraphs of guidance that were not there before. Search Engine Roundtable’s Barry Schwartz found the change only by comparing the live page against a Wayback Machine capture of the same URL. No blog post, no changelog entry, and no advertiser email accompanied the edit.
The most consequential addition concerns Smart Bidding’s learning phase. Google’s automated bidding systems need roughly seven to fourteen days to gather enough conversion data and settle into a stable delivery pattern. The newly added text states, for the first time in this document, that manual changes to budget levels, to target CPA or ROAS figures, or to conversion goals during that window restart the clock. A team that adjusts targets twice a week, chasing short-term swings in performance, can keep an account permanently stuck in the learning phase without ever seeing it stabilize. Until this update, nothing in Google’s own documentation said so.
None of this describes new behavior. Smart Bidding has worked this way for years. Advertisers who tune campaigns too often have been quietly losing performance to a restarting learning window long before Google wrote the rule down. What changed is that Google decided to document it, and the choice of what to document is itself information: pages generally do not gain paragraphs of new guidance unless the underlying behavior has been generating enough support tickets or account-review escalations to justify a permanent, linkable explanation.
The same edit tightened several adjacent points. Running a conversion import now requires two permission levels at once, Admin-level access on the Google Ads side and Edit rights on whichever Google Analytics property is linked to it, a combination advertisers previously had to infer. The document also states plainly that only Google Analytics events explicitly marked as key events are eligible to import as conversions, and that linking an account or marking a new key event takes 24 to 48 hours before the resulting import options show up inside Google Ads. A separate addition makes explicit that view-through conversions, ad impressions a shopper saw but never clicked, sit outside the primary Conversions column, so Smart Bidding optimizes toward real interactions rather than passive exposure. Advertisers serving the European Economic Area got a pointed reminder that Consent Mode has to be configured correctly to keep conversion data accurate.
Per Google’s own documentation, none of these mechanics are new. What is new is the decision to spell them out on a page advertisers already consult, which functions as a rough map of where confusion and support load have been concentrated: permissions, key-event eligibility, propagation delays, view-through handling, and EEA consent. Google shipped this clarification with no announcement and no version history, which means the only way to catch it was Schwartz’s side-by-side diff against an archived copy of the page.
That method deserves to become routine practice, not a one-off catch. Google regularly revises help-center language that changes what advertisers should assume about bidding, measurement, and eligibility, without publishing a changelog anywhere a search team would see it. Search teams managing Google Ads accounts should audit live campaigns against the learning-phase language before the next round of bid or budget edits, and any team serving EEA users should confirm Consent Mode is configured correctly rather than assuming it still is.
Barry Schwartz reported the change for Search Engine Roundtable on Monday, July 27, 2026.
