Google Ads August 17 Bidding Update — Video Q&A Breakdown (2026)
Google Ads Liaison Ginny Marvin released a 5-minute video Q&A on the August 17, 2026 Smart Bidding update that changes how budget-limited campaigns use CPA and ROAS targets. Here's what's changing, what to expect, and the actions every advertiser should take before the deadline.
Key Takeaways
- On August 6, 2026, Google Ads Liaison Ginny Marvin posted a video Q&A on X addressing the bidding update scheduled for…
- The mechanical change. Budget-limited campaigns that are currently beating their targets — achieving a $20 CPA against a $50…
- Ginny Marvin outlined two scenarios:
The short version
Google Ads Liaison Ginny Marvin released a 5-minute video Q&A on August 6, 2026 addressing the Smart Bidding update rolling out August 17 — a change that makes CPA and ROAS targets the controlling lever in budget-limited campaigns, not budget caps. Advertisers with campaigns over-achieving their targets while marked “Limited by budget” will see performance recalibrate to match set targets, and Google has deployed in-account notifications plus a review tool to help advertisers prepare.
Key facts
- The update rolls out August 17, 2026 and affects all campaign types using Target CPA or Target ROAS Smart Bidding
- Budget-limited campaigns over-achieving targets will adjust to their set CPA/ROAS — the target becomes the efficiency lever
- Google deployed in-account notifications and a review tool to flag affected campaigns
- Advertisers who adjust targets to match current performance should see similar volume post-update
What happened
On August 6, 2026, Google Ads Liaison Ginny Marvin posted a video Q&A on X addressing the bidding update scheduled for August 17 — a change that has generated significant concern across the PPC industry. The 5-minute video, covered by Search Engine Roundtable, answers three core questions advertisers have been raising since Google first announced the Smart Bidding changes.
The core change: campaigns limited by budget AND over-achieving their CPA or ROAS targets will see performance adjust to their set targets, rather than continuing to outperform them. In budget-constrained campaigns, the target will now function as the efficiency lever — exactly as it already does in campaigns without budget limits.
“I am honestly not sure if these responses will be enough,” SERoundtable’s Barry Schwartz wrote. “I think the PPC folks are still super concerned to see what happens to the data after August 17th.”
PPC Land reported this is one of three simultaneous bidding updates Google is rolling out: the target behavior change, a Promotion Mode beta optimizing for promotional events, and expanded Smart Bidding exploration testing new auction signals. Our guide on Google Ads AI bidding and budgeting updates for August 2026 covers the full scope.
What exactly is changing?
The mechanical change. Budget-limited campaigns that are currently beating their targets — achieving a $20 CPA against a $50 Target CPA — will no longer continue outperforming. The system recalibrates bidding to align performance with the set target.
Why now. Google wants consistent bidding behavior across all campaign types. In unconstrained campaigns, the target already controls both spend and efficiency — raising a ROAS target may lower spend as the system seeks greater efficiency. This update extends that same logic to budget-constrained campaigns, treating the target as the primary efficiency control rather than the budget cap.
Budget change stability. Advertisers have historically experienced performance fluctuations when adjusting budgets in target-based campaigns. Google says the update makes performance more stable during budget changes since the system holds to the target rather than recalibrating around new spend levels.
What should you expect after August 17?
Ginny Marvin outlined two scenarios:
You adjust your target to match current performance. If you update your CPA or ROAS target to reflect what the campaign is actually achieving, Google says you should see similar conversion volume after a brief recalibration. The system continues maximizing volume within budget while targeting the same efficiency level.
You take no action. If your set target is looser than actual performance and you leave it unchanged, the system aims for conversions at the set target. This may mean entering different auctions — bidding in higher-CPC auctions the campaign previously avoided, or shifting impression share to queries with different conversion profiles. The result could be a substantially different CPA/volume mix.
Marvin emphasized one critical nuance: “Remember to take the full conversion cycle into account when evaluating your current average target performance.” Delayed conversions — common in B2B and high-consideration purchases — may not appear in recent data. Use a longer lookback window before deciding your “actual” performance. For guidance on choosing between bidding strategies, see our Target CPA vs Target ROAS comparison.
What to do now
- Run a gap analysis on all “Limited by budget” campaigns. Filter your campaign list by the budget status column, then compare set Target CPA/ROAS against actual 30-day averages. Flag every campaign where actual is 20%+ better than target — these are your at-risk campaigns.
- Adjust targets before August 17. Set targets to your actual trailing 30-day average, accounting for your full conversion cycle. If you’re unsure, err on the side of a slightly looser target — you can tighten later, but reversing volume loss is harder.
- Document your pre-update baseline. Screenshot current CPA, conversion volume, impression share, and average CPC for every affected campaign. You’ll need these to measure the update’s actual impact during the 72-hour recalibration window.
- Check Google’s in-account notifications. Google deployed a review tool and notifications for affected campaigns. They link to campaign-specific guidance — don’t ignore the red badges.
- Schedule a post-update review for August 20. Block 30 minutes to compare post-update performance against your baseline. If volume dropped and targets were adjusted correctly, consider widening targets incrementally rather than reverting.
What this means (our take)
The August 17 update is the logical endpoint of Google’s multi-year push to make Smart Bidding targets the single source of truth for efficiency. Every advertiser who has lazily set a $200 Target CPA on a campaign that consistently runs at $40 has been freeloading on the gap between target and actual. Google is closing that gap.
A world where your CPA target means exactly what it says is more predictable than one where the target is aspirational and the budget cap does the real work. But it demands target hygiene most advertisers haven’t practiced. The real risk isn’t that the update breaks campaigns — it’s that advertisers discover their targets were set years ago, during a different competitive landscape, and haven’t been touched since.
For a broader view of how automated bidding is evolving alongside AI agents, see our piece on AI Agents for Google Ads Bidding — the August 17 update is one piece of a much larger shift in how Google distributes bidding control.
FAQ
What is changing in Google Ads bidding on August 17, 2026?
Campaigns that are limited by budget and over-achieving their CPA or ROAS targets will see performance adjust to align with their set targets. The target becomes the efficiency lever — the system will aim to achieve your exact CPA or ROAS target regardless of whether the campaign is budget-constrained, which is already how unconstrained campaigns work today. This was confirmed by Google Ads Liaison Ginny Marvin in a video Q&A posted on August 6, 2026.
What should I do before the August 17 Google Ads bidding update?
Review all campaigns marked “Limited by budget” and check the gap between your set target and actual CPA or ROAS. If your campaign is achieving a $20 CPA against a $50 target, either adjust the target to reflect real performance or be prepared for the system to bid toward the $50 target. Google has rolled out in-account notifications and a review tool to help identify affected campaigns.
Will my conversion volume drop after the Google Ads bidding change?
If you adjust your target to match current average performance, Google says you should see similar conversion volume after a brief recalibration. If you do nothing and your set target is looser than actual performance, the system may enter different auctions, potentially changing your volume and CPA mix. Wait at least 72 hours before evaluating post-update steady-state performance.
Is this Google Ads bidding update related to the Demand Gen CPA doubling?
These are separate changes. The August 17 bidding update affects all campaign types using target-based bidding (Target CPA, Target ROAS) when budget-limited. The Demand Gen CPA doubling targets a specific campaign type and was announced separately. Both are part of Google’s broader August 2026 Smart Bidding overhaul, alongside the new Promotion Mode beta and expanded Smart Bidding exploration.
How do I know which campaigns are affected by the bidding update?
Google rolled out in-account notifications and a dedicated review tool to help advertisers identify campaigns impacted by the August 17 update. Look for campaigns with the “Limited by budget” status where actual CPA or ROAS is significantly better than your set target. Account for your full conversion cycle when evaluating average target performance, since recent data may not yet reflect delayed conversions.
Sources
- Search Engine Roundtable — Google Ads Video Q&A On August 17 Bidding Update (Aug 6, 2026)
- PPC Land — Google says targets become the efficiency lever in budget-capped campaigns (confirmed via Google News RSS, Aug 6, 2026)
- Search Engine Journal — Google Clarifies Smart Bidding Update After Advertiser Concerns (confirmed via Google News RSS, Aug 2026)
- ALM Corp — Google Ads Is Changing How Target Based Bidding Works (confirmed via Google News RSS)
- Search Engine Roundtable — Google Ads Bidding Target Optimization Changing, Promotion Mode Beta (confirmed via Google News RSS)
