Google has changed how it describes the Smart Bidding learning period again. In late September the Google Ads help center added a specific benchmark: "up to around 50 conversions or three conversion cycles." Now the number 50 is gone from that page, which says strategies typically need 1–2 conversion cycles. Google does not appear to have changed the algorithm itself; what changed is the documentation.
What changed in the Google Ads help center
On September 22, 2026, as spotted by Search Engine Land and PPC News Feed, Google updated its pages on the learning period and on changing conversion goals. The wording "up to 3 weeks or 1–2 conversion cycles" was replaced with: a bid strategy may need "up to around 50 conversions or 3 conversion cycles." For advertisers it was a clear number, letting them estimate from campaign stats how much data had been collected.
Now the learning period duration page no longer gives a specific number. Google says a bid strategy may need a few conversion cycles, typically one or two, to calibrate to a new goal. Learning speed depends on the number of conversions, the length of the conversion cycle and the bid strategy type, and historical data from earlier campaigns speeds up the start.
What a conversion cycle is
A conversion cycle is the time between an ad click and the conversion itself. If someone clicks today and buys three days later, the cycle is about three days. In nutra with fast leads the cycle can take minutes, while in finance or B2B, where a manager processes the lead, it can take weeks.
So the same "1–2 cycles" means very different amounts of time for different campaigns. Check conversion lag in the "Time to conversion" report in Google Ads to see how long you actually need to wait.
Does this mean Smart Bidding learns faster?
No. Google has not announced an algorithm change; only the help center wording changed. The number of conversions is still one of three factors that determine how long learning takes. A campaign with lots of quality conversions gives the algorithm more data than an account with one lead every few days. Google just no longer names a fixed threshold after which learning is "done."
Google also notes that its algorithms keep learning after the "Learning" status disappears from the account. The label going away is not the moment the strategy stops adjusting.
Where the 50-conversion benchmark still applies
The number 50 was removed from the learning period page, but not from all of Google's guidance. For example, Google's Demand Gen best practices explicitly advise against evaluating a campaign until it has at least 50 conversions. So reading this as "Google dropped the 50-conversion rule" is wrong.
What media buyers should do
- Measure learning in cycles, not days. Check how long after a click your conversions arrive, and don't draw conclusions before one or two full cycles.
- Don't keep tweaking settings. Frequent changes to budget, target CPA, strategy or goal disrupt learning. This matters most for small campaigns, where every edit has a bigger effect on results.
- Send conversions fast and accurately. The faster a postback or offline conversion reaches Google, the shorter the cycle is for the algorithm. If conversions go missing, work through our checklist Postback not arriving.
- Use account history. Launching in an account with accumulated conversions goes faster than in a fresh one.
- Keep the 50 benchmark for Demand Gen. Google still recommends waiting for 50 conversions there before evaluating.
If you are just starting with Google Ads, begin with our guide on how to launch Google Ads campaigns.
FAQ
How long does Smart Bidding learning take?
According to Google's current help center, typically one or two conversion cycles. The exact time depends on conversion volume, cycle length and the chosen strategy.
Are 50 conversions still needed for learning?
That number was removed from the learning period page. Conversion volume still affects learning, and for Demand Gen Google advises waiting for 50 conversions before evaluating.
What is a conversion cycle?
The time between an ad click and a conversion. You can see it in the time-to-conversion report in Google Ads.
Has the Smart Bidding algorithm changed?
Google has not said so; the documentation wording changed.
Is learning over once the "Learning" status disappears?
No. According to Google, its algorithms keep learning after the status stops showing.
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Sources: Google Ads Help — learning period, Search Engine Land, PPC News Feed, Google — Demand Gen best practices.