In almost every advertising account we take over, there's a line of spend with nothing to show for it. Not underperforming. Nothing. Hundreds of clicks, zero orders, running for months because nobody looked.
Amazon wasted ad spend hides well, because the account totals still look plausible. A blended ACoS of 28% can be a healthy 20% core with a pile of dead clicks stapled to it, and the dashboard will never separate the two for you. You have to go and find it.
Where Amazon wasted ad spend hides
The search term report is where the bodies are buried. Amazon will tell you, term by term, what every click cost and what it bought. Most brands have never opened the report. Fewer still read it with the only question that matters: what did this money buy?
When we run that question down a new account, the same thing turns up almost every time. Somewhere near the top of the spend column sits a search term that has quietly eaten more than some entire campaigns — matched in through broad or auto targeting, vaguely related to the product and completely unrelated to anyone's intent to buy it. That row isn't a tweak candidate. It's money leaving the building.
Finding the waste is the easy half. Knowing what to do with each kind of it is where most DIY attempts come apart.
Negatives are hygiene, not strategy
Negative keywords are the least glamorous lever in Amazon advertising, which is probably why so few accounts use them properly. The pattern we inherit is depressingly consistent. Auto campaigns untouched since they were created. Broad match funding window-shoppers. The same dead term paid for month after month. No negative list anywhere in the account.
The fix is relentlessness rather than cleverness: a standing routine against fresh search-term data, with the right kind of negative applied to the right kind of waste. Done once, it's a purge and the waste grows back within a quarter. Done as a fixture, the way we run it for every brand we manage, it typically saves more over a year than any bidding cleverness we've ever deployed.
The places you're bidding against yourself
The second place money vanishes is duplicate targeting. The same keyword sitting in an auto campaign, a broad campaign and an exact campaign, all live at once, all eligible for the same auction. You end up competing with yourself for placement while making the data impossible to read, because three campaigns each own a third of the picture.
Untangling that is where this stops being admin. Every proven term needs one deliberate home in the account, and choosing that home well is judgement, not tidying. We've watched brands attempt the clean-up themselves and switch off the exact terms that were quietly carrying the account.
While you're thinking about auctions, look at who else appears on your listings. If resellers you never authorised are running ads on your brand terms, you're bidding against your own product, and no amount of campaign hygiene fixes that. The leak sits in the channel itself, the same one we describe in why 'just run more ads' won't fix your Amazon sales, and it's why so many brands mistake a control problem for a marketing one.
Why this has to happen before Prime Day
Timing is where this audit earns its keep. Prime Day and Q4 multiply your traffic, which means they multiply everything, including the waste. A term leaking £3 a day in March leaks a great deal more in Black Friday week, at inflated CPCs, precisely when you can least afford it.
So we run the wasted-click audit as a fixture before every major trading event, not as a post-mortem after one. Cleaning an account in October is preparation. Cleaning it in December is regret.
Ring-fence what you save
One more discipline, and it's the one that separates operators from dabblers. When the audit frees up money, don't let it evaporate into "lower spend this month". Move it, deliberately, into the terms you already know convert.
We run ring-fenced ad budgets for the brands we manage, sized against contribution margin and agreed up front. One brand in our portfolio runs £10,000 a month on that basis. At that level, hygiene isn't pedantry. A 10% waste rate is £12,000 a year, spent on clicks nobody can explain.
That's not a small number. And in most accounts it's sitting in a report nobody has opened.
Want a rough sense of your own number? Open your search term report and ask of the biggest rows: what did this money buy? Rows with an answer mean your account is in better shape than most. A few without one is normal, fixable and worth sorting before the next event rather than after. We run this audit weekly for the brands we manage, and the diagnosis costs nothing.
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