Most Amazon sellers don't realize their PPC campaigns are bleeding money until the monthly report lands. ACOS climbing quietly, wasted spend on irrelevant search terms, and stale bids are some of the most common issues we find during account audits.
Sign #1: Your ACOS keeps creeping up with no clear cause
If your advertising cost of sale has been rising for more than two or three weeks straight, it's rarely random. It usually points to bid inflation, increased competition on your core keywords, or campaigns that were never restructured after your catalog grew.
Sign #2: You're still running one flat bid across all placements
Top of search, product pages, and rest of search all convert differently. A single flat bid across all three almost always overpays in one placement while underbidding in another.
Sign #3: Your search term report is full of irrelevant clicks
If you haven't mined your search term report for negative keywords in the last 30 days, you are very likely paying for clicks that were never going to convert.
Sign #4: Your best selling products don't have dedicated campaigns
Bundling your top performer into a broad, mixed campaign buries its performance data and makes it harder to scale spend on exactly the product that's already proven to sell.
Sign #5: You haven't touched your bids in over a month
Amazon's auction landscape shifts constantly. Bids that were efficient 6 weeks ago are frequently overpaying or underexposed today.
If two or more of these sound familiar, it's worth a full campaign audit before scaling your ad budget any further.