Every year around this time I get the same email. Sales are flat, the biggest trading weeks of the year are coming, and someone has decided the fix is to tear down the advertising account and rebuild it before Black Friday.
It is the most expensive habit in retail.
I have spent twenty years in ecommerce marketing and audited more than 1,300 online stores, most of that time in Shopify Google Ads management. The same November panic turns up in account after account. Most stores that struggle through peak season have a perfectly good account structure. They just built it two weeks too late.
The machine needs history, and you keep deleting it
Almost every ad platform now sets bids automatically, and it does that by learning from your recent conversion data. Google is explicit about what resets that learning. Creating a new bid strategy, changing a setting on an existing one, or adding and removing campaigns all push a campaign back into a learning period that can run up to three weeks, depending on how many conversions you get and how long your buying cycle is.
Rebuilding Performance Max for Shopify campaigns is the most common version of this, and the most expensive, because those campaigns lean harder on conversion history than anything else in the account.
Three weeks from the first week of November lands you in the last week of the month. That is the exact fortnight you were rebuilding to win.
So the calendar matters more than the idea. The same restructure that earns you money in February will cost you money in November. Do it in the quiet months, when a fortnight of unstable bidding is affordable.
Fix the boring things instead
The work that pays before peak is unglamorous and barely touches campaign structure.
Start with your product data, because it decides what you are eligible to show for in the first place. Wrong prices, missing sizes, stale availability and thin titles quietly disqualify products from the auction, and no bid adjustment rescues a product the platform will not display. Open the disapprovals and warnings report on your product feed and clear it before the end of October.
Then check that your tracking still fires. Buy something from your own store, all the way through, and confirm the sale appears in the ad platform with the right value attached. Every year somebody ships a theme update that breaks the conversion tag, and nobody notices until the bidding has been flying blind for a fortnight.
Shipping and returns settings deserve an hour too. Delivery estimates and free-shipping thresholds now surface inside ad placements, so a store quoting a slower estimate than the shop next door loses the click before price ever enters the decision.
Know what a customer can cost you in December
Peak-season economics are not your normal economics, and plenty of businesses advertise through November on margin numbers they worked out in March.
Discounts are deeper. Return rates run higher on gifting, because people buy for someone whose size they guessed. Freight surcharges land in the busiest weeks. Put those three together and the amount you can afford to pay to acquire a customer in December is often well below the figure you have used all year, even while revenue looks better than ever.
Work out the December number before December, then set your targets to it.
Freeze, then watch
Two weeks out, stop changing things. Budgets can move, and they should. Structure, bid strategies, conversion actions and tracking should not.
That leaves you free to do the job that matters during peak, which is watching stock and margin rather than the account. Pull the products that are running out, so you stop paying for clicks you cannot fulfil. Pull the ones where the discount has eaten the margin, even if they are selling well, because volume at a loss is still a loss. Those two decisions will do more for your December profit than any rebuild.
If you want a project for the quiet weeks, take the restructure you were planning and put it in the diary for late January. It will work better then, and it will be built on the data peak season is about to hand you.
About the author. Joshua Uebergang is the founder of Digital Darts, an ecommerce marketing agency that has worked with online stores since 2015, and the author of Google Shopping for Shopify: The Definitive Guide. He has audited more than 1,300 online stores.