Google Ads Bidding Update Hits August 17: What Every Advertiser Needs to Do Now

By Corey Frankosky · Last Updated August 6, 2026

The Google Ads bidding update lands on August 17, 2026, and it changes how Smart Bidding behaves on budget-limited campaigns. Google Ads announced three bidding and budgeting updates on June 15, 2026, but this is the one that applies automatically. If your campaign is limited by budget, your actual CPA or ROAS may start moving closer to the target you set. A campaign getting leads at $5.00 against a $10.00 Target CPA could start paying more per lead after August 17, so you need to audit your targets now.

What the August 17 Change Actually Does

Ginny Marvin, Google's Ads Product Liaison, announced three bidding and budgeting changes. Here is how they break down so you know what is automatic and what is optional:

• Bidding target optimization (August 17): a backend change that pulls budget-limited, target-based campaigns closer to the target you set. This one is automatic. You do not opt in.
• Smart Bidding Exploration (expanded): an opt-in feature that lets campaigns chase converting searches outside your current targeting. It is now broader than before.
• Promotion Mode (new beta): an opt-in tool for temporarily loosening ROAS and adding budget during peak periods like sales and seasonal spikes.

These pull in different directions, so do not read them as one thing. The August 17 change asks you to tighten and confirm your targets. The other two ask you to deliberately loosen them for a window or a query frontier. The key idea for August 17 is simple. The system will try to move toward the target you gave it, not the better results you happened to get. Google is not changing your targets for you, so your setup now matters more than ever. If your budget is tight and your campaign has been beating an old target, Google may now spend harder to get closer to that older number, which can mean higher costs, fewer conversions, or both.

Which Campaigns Are Affected

The August 17 change applies to Search, Shopping, Performance Max, Demand Gen, and Travel campaigns. Display and Hotel campaigns already use the new bidding behavior, so nothing changes for them on that date. App, Video reach, and Video view campaigns keep their previous behavior.

The bid strategy labels also changed in June 2026 with no change in how they work. You will see "Maximize conversions with a Target CPA" renamed to "Target CPA" and "Maximize conversion value with a Target ROAS" renamed to "Target ROAS."

Audit Your Target-Based Campaigns Now

Start with budget-limited campaigns that use target-based bidding. Those are the campaigns most likely to move on August 17. Pull a list of every campaign using Target CPA, Target ROAS, Maximize Conversions with a target, or Maximize Conversion Value with a target. If you manage Demand Gen campaigns, include any that use Target CPC too.

For each campaign, log these details so you can rank them by risk:

• Set target: the Target CPA or Target ROAS currently in place.
• Actual performance: the real CPA or ROAS over the last 30 to 90 days.
• Conversion volume: how much data the strategy has to work with.
• Budget status: whether the campaign shows "Limited by budget."

The riskiest campaigns are the ones beating their targets by a wide margin while limited by budget. If a campaign has a $10.00 Target CPA but is coming in at $5.00, that gap can shift after August 17 because Google may bid more aggressively to move performance closer to the set target. Flag campaigns that are well below their CPA target or well above their ROAS target first. Use bid strategy status as a gut check before you touch anything. If a campaign is still in Learning, note that and avoid extra changes, because new edits can stretch the learning phase right as the update rolls out.

Reset Your Targets Before the Deadline

Use your audit to decide which campaigns need tighter targets, more budget room, or no target at all. Pull the last 30 days of data and compare the stated target with actual performance. If a campaign is delivering a $35.00 CPA against a $50.00 Target CPA, lower the target to about $35.00 to help keep the efficiency you already have. The same logic applies to ROAS. If actual ROAS is at 4.5x against a 3.0x target, move the target up so it reflects what the campaign is already doing.

Google also released a Bid Target Adjustment Tool on July 6, 2026, and began showing in-account notifications based on your historical performance. You can use the Bid Target Adjustment Tool to match your targets to recent actual results before the change takes effect.

Budget and target need to fit each other too. A tight budget with a loose target is a common mismatch going into August 17, and after the update that setup is more likely to lead to fewer conversions at a higher cost. If the budget is fixed, consider switching to untargeted bidding so delivery is driven by volume instead of efficiency. If the budget can move, leave room above your daily spend so the campaign does not keep running into its daily cap. Untargeted bidding often makes more sense for low-volume or new campaigns, because a target can box the campaign in before it gathers enough data. If you want help pressure-testing your setup before the deadline, our Google Ads management services and Google Ads consulting both cover this kind of audit.

Validate Conversion Tracking

Smart Bidding is only as good as the conversion data feeding it. If you are tracking the wrong actions, missing revenue values, or counting the same conversion twice, August 17 can make that problem worse, because Google will optimize harder against bad inputs. The most common mistake is bidding toward the wrong conversion. Only bottom-of-funnel actions like purchases, qualified leads, and qualified calls should be marked as Primary. Micro-conversions like "Add to Cart" or page views should be moved to Secondary so they do not shape bidding.

If you use Target ROAS or Maximize Conversion Value, confirm that correct revenue values are passing through your tags. For B2B or sales-assisted campaigns, offline conversion imports often matter most, because deals may close days or weeks after the first click. Importing MQL, SQL, or closed-deal data from your CRM gives the system a cleaner signal for value-based bidding. Then review your tags, linked GA4 events, call tracking, and form submissions for deduplication and attribution consistency.

Monitor Performance After August 17

Once your targets and tracking are clean, spend the first two weeks after August 17 measuring impact, not hunting for setup issues. Check your main metrics every day from August 17 through August 31. Pay close attention to CPA, ROAS, spend, conversion volume, conversion value, click volume, and impression share. If you run Performance Max or Demand Gen campaigns, watch for channel mix changes across Search, Shopping, Display, and Video, because that shift can come straight from the update even if overall CPA looks steady.

Give the system time before you judge results. Wait 1 to 2 conversion cycles, and if your lag is 7 days, use at least 14 days. Avoid using Performance Planner forecasts from August 17 through August 31. When performance clearly drifts outside your tolerance, change only one target or budget at a time and keep the edits small, around 5% to 10% per change. Then wait another full conversion cycle before you touch anything else. A lot of advertisers get in trouble here by changing targets, budgets, and conversion settings all at once, which makes it almost impossible to tell whether the shift came from the update or from your own edits.

The Two Opt-In Updates

The August 17 change is automatic, but the other two updates are features you choose to turn on. Neither one is required, and both are worth understanding before you decide whether they fit your account.

Smart Bidding Exploration lets you set a ROAS tolerance so your campaigns can chase converting searches outside your current targeting without rebuilding your setup. It has been available for Search since 2024. As of the June 15 announcement, it is now globally available for Performance Max campaigns without a product feed, with a separate beta for Shopping and Performance Max campaigns with a product feed. To get into the beta, you contact your Google Ads account team. Google says campaigns using the feature see, on average, an 18% increase in unique converting search query categories and a 19% increase in conversions. Those are Google's own numbers, so treat them as the ceiling, not a promise. My honest take is that this is a way for Google to go beyond your existing targeting and spend more to find conversions. It reminds me of how broad match keywords promise the world, and then you look at your data and it did not work out exactly how you pictured. If your conversion data is strong, this can be a good feature. If your conversion data is weak, it can burn budget. Test it on one campaign before you roll it out.

Promotion Mode is a new beta for Search and Performance Max campaigns. It lets you schedule a temporary boost, loosening your ROAS tolerance and adding extra daily budget across a defined window, then reverting on its own when the window closes. It is different from a seasonality adjustment. A seasonality adjustment tells Smart Bidding to expect a change in conversion rate. Promotion Mode actually loosens your efficiency target and hands the campaign more budget for the window. This one looks genuinely useful to me. When your Target ROAS is set high, it can be hard to spend your budget because the system will not chase auctions that do not meet the target. Promotion Mode lets you say that during a specific window you are willing to give up some ROAS to capture more volume. That is great for ecommerce when demand picks up and for seasonal businesses. If you sell pool equipment, you get most of your sales in spring, summer, and early fall, so you might loosen things in season and tighten back up when volume drops. It is opt-in and off by default, so nothing happens unless you set it up.