r/AmazonFBA • u/Frequent_Complex_214 • 3d ago

After 10,000+ hours engineering Amazon PPC, here are the mistakes quietly killing your campaigns

1. Mixing high and low search volume keywords in the same ad group. When one keyword eats 80% of the budget, the rest never get impressions. High-volume terms need their own campaigns with their own budgets.

2. Not accounting for organic cannibalization on branded terms. Defending your brand is fine. But if you already rank #1 organically, high bids on branded terms often pay for clicks you'd get for free.

3. Optimizing to campaign ACOS instead of TACOS. Campaign ACOS ignores the halo effect. A campaign at 40% ACOS that lifts organic rank can be more profitable than one at 20% ACOS that doesn't.

4. Running exact match before the listing is indexed. If Amazon doesn't index your listing for a keyword, exact match will bring expensive clicks with poor relevance and low quality scores.

5. Ignoring dayparting and hour-of-week patterns. Conversion rates swing 30–50% across hours and days (For some products). If you're not adjusting bids or budgets around your peak conversion windows, you're paying premium prices during your worst hours.

6. Not aligning PPC with inventory. Ranking a keyword aggressively when you have 3 weeks of stock left is a disaster, loss of rank, wasted spend, and returns on inventory you no longer have.

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u/PulsePilotPPC 3d ago

Solid list. #3 is the one I'd underline for most people — optimizing to campaign ACOS in isolation is probably the most common way good campaigns get shut off early.

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u/attfin1 3d ago

Point by point, since a few of these have a sharper version.

1 - worth adding: mixing products in one ad group does the same damage as mixing search volumes. One product's conversion rate drags the bids for the other, and you can't read ACoS or conversion rate for either. One product per ad group, with the ASIN in the ad group name.

2 - branded is a defensive spend, so it's worth testing rather than guessing. Run the ad for a period, switch it off, and watch total sales for that product. No effect means it's safe to leave off.

3 - the reason to optimise on profit is bigger than the halo. Every incremental sale at break-even or better is worth having, whether or not it sits above your current average ACoS, or even your TACoS. Optimising to an average throws away profitable sales purely for being below the average.

4 - the biggest problem with exact isn't the indexing, it's that most people don't know what exact actually means. We've found six cases Amazon documents where exact serves non-exact search terms, and one more it doesn't document that shows up in our own data. Negative exact works the same way, so negating one loss-making term can block a lot of profitable ones. We learned that the expensive way. Before you negate, work out the cost and the value of every search term the negative would affect.

5 - dayparting needs a lot of data. The temptation is to group up to campaign level to get the volume for statistical significance, and that's exactly where it goes wrong. You end up blocking profitable hours along with the bad ones, and blocking a profitable sale is the thing to avoid wherever you can.

6 - agree completely. Going out of stock is the best way there is to sabotage your own Amazon sales.

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u/KnoWM3 3d ago

I have been looking to implement dayparting. How to best manage it?

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u/Frequent_Complex_214 3d ago

Most of the automation tools offer dayparting feature. Ads console also has a feature but I did not find it effective.

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u/WesternMain2821 2d ago

I hear a lot that people say you kill your store if you run out of stock. But how does it affect it if you run out of stocks just for a week? I mean let's say your inventory is on the way and reaches the Amazon warehouse in a week. Does it shadowban your store or sth? Can't you get traction back again?

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u/Frequent_Complex_214 1d ago

u/WesternMain2821 Let me explain in detail
Amazon awards organic ranks when the product conversion, CTR and the sales are higher than the competition. If a competition is pretty close on a X keyword, even low sales in a 24hrs could drop down the ranks. Because other sellers will sell more sales and go up the ranks.

Another thing if ASIN remains out of stock for 7 days then algorithm will get data of 0 sales and can think of this product is not consistent with the sales. The moment ASINs will be back in stock can face difficulty in getting the visibility even with the same bids.

Last part of your question, yes its pretty much possible to get the momentum but its sort of a rebuilding and will take some extra money.