High spend with few sales almost always means you are paying for clicks from shoppers with the wrong intent, or sending the right shoppers to a listing that does not convert. Pull your Search Term report and check the ratio of clicks to orders per term — if terms with many clicks and zero orders dominate spend, it is a targeting problem; if your conversion rate is below your category norm across the board, it is a listing problem.
Diagnose targeting first
Download the Sponsored Products Search Term report for the last 60 days. Sort by spend descending and add a column for orders. Any term with spend above roughly 2× your target CPC and zero orders is a candidate for negation.
Broad and phrase match campaigns are the usual culprits. They pick up loosely related searches that look relevant to Amazon's matching engine but are not what your product actually is.
Then check the listing
If good, exact-intent keywords are also failing to convert, more traffic will not help — it will just cost more. Compare your conversion rate against your category. Under-performing there points at price, main image, review count or rating rather than at the campaign.
Paying to send buyers to a page that does not convert is the most expensive mistake in an Amazon account, because the cost scales with every click.
The order of operations
Fix targeting before scaling budget. Fix the listing before fixing targeting. Spending more on top of either problem multiplies the loss rather than solving it.
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