Google Ads Promotion Mode for Ecom Brands in Q4A Playbook

Google Ads has a new beta setting built for sales, and it is called Promotion Mode. If you run an ecommerce store and plan to spend more on Google this Q4, it lets you tell Google to go after more sales for a few days at a lower return, then go back to normal on its own.

This playbook explains what it does in plain terms, how to get it, how to set it up, and how to time it and keep a Black Friday sale profitable. The sources are Google's official announcement, the Ads Liaison's post on X and Ginny Marvin's Community Q&A on bidding and budgets. It is a beta, so what you see in your account may differ.

What does Promotion Mode do for an ecommerce store?

Normally, a Target ROAS campaign skips auctions it does not expect to meet your target. Google notes that changing your target limits or increases the number of auctions your ads are eligible to enter. In the middle of a sale, a tight target can mean you miss sales you would happily take.

Promotion Mode changes that for a set window. Per Google's Q&A, Smart Bidding actively aims to achieve your lowered ROAS target for those dates, so it bids more aggressively. You can also add extra daily budget. This is our plain-English reading of Google's description, not a quote.

Who can use Promotion Mode, and how do you get it?

• ▶Campaigns: Google lists Search and Performance Max only. Shopping campaigns are not included.
• ▶Level: it is a campaign setting, so you turn it on for each campaign you want in the sale. Seasonality adjustments, by contrast, are set under Tools and can cover campaign types or whole accounts.
• ▶Bid strategy: Promotion Mode is powered by Smart Bidding Exploration, which Google says is available when you use Target ROAS.
• ▶Access: it is a beta. Google says to reach out to your account team to get it.
• ▶Dates: the promotion dates should fall within the campaign's own start and end dates.
• ▶Budget: it works with daily budgets, and the ROAS tolerance change can be combined with a campaign total budget.
• ▶Caveat (unverified): trade reports say the baseline ROAS target cannot be changed while a promotion is active, and we found no Google page saying so. Context: Promotion Mode is powered by Smart Bidding Exploration, and Google's Exploration best practices say not to adjust your Target ROAS after opting in.

How do you set up Promotion Mode?

Google's screenshot shows the setting inside the campaign settings, under the bidding options. Your account may label things slightly differently while it is in beta.

1. 1.Open the campaign's settings and find Promotion mode.
2. 2.Tick "Ramp up spend quicker on promotion dates".
3. 3.Set the start and end dates, 3 to 14 days, inside the campaign's own dates.
4. 4.Enter your Target ROAS tolerance as a percentage.
5. 5.Optionally enter extra daily budget.
6. 6.Save. Google's side panel says the campaign reverts to your normal target ROAS and average daily budget on other dates.

How should you set the dates and tolerance for Black Friday?

Start with profit, not the setting. Break-even ROAS is your price divided by what is left after product cost, before other costs. Illustration: a $100 product that costs $65 breaks even at about 2.9. At 20% off the price is $80, the cost is still $65, and break-even jumps to about 5.3.

If break-even at your sale price is above your normal target, a lower target means you are buying those customers at a loss on the first order. That can still be fine if you count repeat purchases, but decide that on purpose.

• ▶Dates: Black Friday 2026 is November 27 and Cyber Monday is November 30. A 4-day window from Friday to Monday fits inside the 3 to 14 day limit, and so does a 12-day run from November 20 to December 1.
• ▶Tolerance: Google's Q&A allows 5% to 90% for Promotion Mode, and its screenshot shows 15% as an example. Google's Smart Bidding Exploration help, the feature Promotion Mode is built on, gives the arithmetic: a 200% target with a 10% tolerance becomes an effective 180%. We found no Promotion Mode page repeating it, so check your account's preview. Our read is to test a modest value first and widen only if the results beat break-even.
• ▶Extra budget: it is optional. Add it only if your campaign is budget-limited during the window.
• ▶Decide first: settle your normal ROAS target and budget before the start date, so you know exactly what the window changes.

What is the Promotion Mode playbook for Q4?

1. 1.Now to early November: confirm your account has Promotion Mode by asking your Google account team, and list the Search and Performance Max campaigns on Target ROAS that will carry the sale.
2. 2.By mid November: work out break-even ROAS at your sale prices, then decide the tolerance and any extra daily budget. Settle your normal targets first so you know exactly what the window changes.
3. 3.Before the window: build the offer itself with promotion assets and a Merchant Center promotion, as in our BFCM Google Ads playbook, and check that no expired offer is on your site, because Google's Automated promotions setting can read offers from it.
4. 4.Match the window to your best offer. One operator's Q4 playbook on X (Shaun Eng, October 2026) ramps from 20% to 25% to 30% off through BFCM. Our read: the window that lowers your target should line up with your best offer, not your first discount.
5. 5.Schedule the start and end together, for example November 27 to 30, or November 20 to December 1.
6. 6.During the window, watch daily spend and ROAS against the lowered target. Afterward, compare with the same days last year and with break-even.

How do you know if Promotion Mode worked?

• ▶Compare the window with the same days last year: sales, conversion value, ROAS and cost per click.
• ▶Compare achieved ROAS with the lowered target, not your normal one. Google says to judge Smart Bidding against the strategy's average target.
• ▶Do not judge a 4-day window on a weekly average. It is too short for one.
• ▶Check profit after discounts and shipping, not just ROAS.

What mistakes should you avoid with Promotion Mode?

• ▶Setting a tolerance before you know break-even at sale prices.
• ▶Running it on a campaign that is limited by budget. Google says Smart Bidding Exploration, which Promotion Mode is powered by, will not be effective if a campaign is limited by budget, and its mechanism is disabled when the budget is constrained. We found no Google statement on how that works with Promotion Mode's optional extra daily budget, so check before the sale.
• ▶Ignoring Google's own warning. On its Performance Max travel setup page, the only help page we found that mentions Promotion mode, Google says your return on ad spend may be impacted as your campaign rapidly increases spend to take advantage of your promotion period.
• ▶Running it past 14 days or outside the campaign's own dates.
• ▶Forgetting that the offer on your site and ads still has to match. Pair it with the setup in our BFCM Google Ads playbook.
• ▶Treating it as a replacement for seasonality adjustments. They do different jobs, covered in Promotion Mode vs seasonality adjustments.

What should you ask whoever runs your Google Ads?

• ▶Does our account have Promotion Mode, and have we asked our Google account team for the beta?
• ▶What is our break-even ROAS at sale prices, and how low can the lowered target go?
• ▶Which campaigns carry the sale, and for how many days?
• ▶How will we compare the sale with the same days last year?

Related reading: seasonality adjustments for Black Friday.