A working Amazon PPC strategy separates keywords by intent, harvests winning search terms out of automatic campaigns into tightly controlled manual ones, and sets bids against a target ACoS rather than a flat number. Sellers who run this loop weekly tend to move ACoS down 5 to 15 points over a quarter while holding or growing total ad sales.
Most accounts do not have a bidding problem. They have a structure problem. Spend leaks through broad match terms nobody is watching, and profitable search terms sit buried inside an auto campaign at the wrong bid. Fix the structure first and the numbers follow. If you would rather have the structure built and watched for you, our Amazon PPC agency team runs it end to end.
Build the account around three ad types
Amazon gives you three main ad formats, and each does a different job. Treat them as a funnel, not as three copies of the same campaign.
- Sponsored Products: the workhorse. Roughly 70 to 80 percent of most sellers' ad spend runs here because it drives direct sales on search result pages and product detail pages.
- Sponsored Brands: headline and video placements at the top of search. These carry your brand and push shoppers to a Store or a product collection. Budget share of 10 to 20 percent is common.
- Sponsored Display: retargeting and audience placements that follow shoppers on and off Amazon. Usually 5 to 10 percent of spend, aimed at views that did not convert.
A single-product seller can win on Sponsored Products alone. A brand with a catalog of 20 or more ASINs leaves money on the table if it skips Sponsored Brands, because that format defends branded search from competitors bidding on your name.
Separate automatic and manual campaigns by job
The cleanest structure most accounts can run assigns each campaign type one job.
- Automatic campaign: set it to discover search terms. Give it a modest daily budget, 20 to 40 dollars for a mid-volume product, and let Amazon match your listing to queries you did not think of.
- Manual exact campaign: the destination for proven terms. Every keyword here has already converted somewhere else in the account, so bids can run higher with confidence.
- Manual broad or phrase campaign: the expansion layer. It catches variations of proven terms and feeds the discovery loop a second time.
The flow between them is the strategy. Auto discovers, you harvest, exact scales. Without that movement, an auto campaign keeps overpaying for terms that already have a home in a manual campaign, and nothing in the dashboard points it out.
Harvest search terms every week
Keyword harvesting is the single move that compounds. Pull the search term report, filter for terms that produced sales, and check where they live.
- A converting term found only in your auto or broad campaign gets added as an exact keyword in the manual exact campaign.
- That same term gets added as a negative exact in the auto and broad campaigns, so you stop paying discovery prices for a known winner.
- A term that spent 2x your target cost-per-acquisition with zero sales gets added as a negative across the account.
Run this on a 7 to 14 day cadence. A product with 100 keywords will surface 5 to 15 harvest candidates in a typical week early on, tapering as the account matures. Understanding the metric behind these decisions matters, so read what is ACoS before you set thresholds.
Set bids against a target ACoS
Flat bids ignore the economics of each product. Anchor bids to a target ACoS derived from your margin instead.
Work backwards from the number. If a product carries a 40 percent gross margin and you want to keep 25 points of profit after ad spend, your break-even ACoS is 40 percent and your target sits near 15 to 20 percent for a mature keyword. New keywords you are trying to rank can run above target on purpose, because early sales buy organic position.
A practical bid rule for an established keyword:
- Target bid equals target ACoS times the keyword's conversion rate times its average order value, divided by the number of clicks per order.
- In plainer terms: if a keyword converts 10 percent of clicks at a 40 dollar order value with a 20 percent target ACoS, the math supports a bid around 0.80 dollars.
Do not chase a single ACoS number across the whole account. A defensive branded keyword might run at 8 percent ACoS while a top-of-funnel discovery term runs at 45 percent because it earns organic rank. Blend them and the account average lands where you want it.
Read the placement report
Amazon reports performance by placement: top of search, rest of search, and product pages. Top of search usually converts best and costs most.
If top of search converts at twice the rate of product pages for a given campaign, raise the top-of-search placement modifier by 25 to 50 percent instead of raising the base bid. That concentrates spend where the conversion happens rather than inflating every placement equally. The table below shows how a modifier shifts effective bids.
| Placement | Base bid | Modifier | Effective bid |
|---|---|---|---|
| Top of search | 1.00 | plus 50% | 1.50 |
| Rest of search | 1.00 | none | 1.00 |
| Product pages | 1.00 | minus 20% | 0.80 |
Protect your branded terms
Competitors bid on your brand name because it is cheap traffic with high intent. A defensive Sponsored Brands or Sponsored Products campaign on your own brand keywords usually runs at single-digit ACoS and blocks rivals from stealing shoppers who already searched for you. Budget it small, watch the impression share, and raise bids only if a competitor starts showing above you.
Fix the product page before you scale spend
Ad spend sends traffic to a page. If the page does not convert, more spend just raises ACoS faster. Before you pour budget into a campaign, make sure the listing earns the clicks it buys.
Check the basics that move conversion rate:
- A main image that reads clearly at thumbnail size on mobile
- A title that names the product and its top benefit without keyword stuffing
- Bullet points that answer the buyer's first three objections
- A price that sits in range for the category, since a high price tanks conversion no matter how good the ad is
- Enough reviews to clear the trust bar, ideally 15 or more with a rating above 4.0
A campaign with a strong bid and a weak page burns money. The auction rewards conversion, so a listing that converts at 12 percent will win cheaper placements than one at 6 percent bidding the same amount. This is why two sellers can run identical campaigns and post very different ACoS. Fix the page first, then the ad math works in your favor.
Watch these metrics on a weekly dashboard
Running the loop means reading a short list of numbers on the same day each week. Track these per campaign and per top keyword:
- ACoS and total ad sales, to see if efficiency is holding as sales grow
- Impression share on branded and top terms, to catch a competitor moving in
- Search term conversion, to find harvest candidates and dead terms
- Clicks with zero sales, sorted by spend, to catch leaks early
- New keyword rank for terms you are pushing to organic position
The trap is watching ACoS alone. A rising ACoS with rising total sales can mean you are buying organic rank on purpose and it is working. A falling ACoS with falling total sales can mean you cut too hard and starved discovery. Read the pair together, not either number by itself, and judge every change against a 7 to 14 day window rather than a single day.
Give the account time to mature
Amazon's ad auction rewards conversion history. A new campaign will run inefficiently for its first 10 to 14 days while the algorithm gathers data, and pausing it early throws that learning away. Set a realistic 30-day window before judging a new campaign, keep budgets funded enough to gather 10 or more conversions per keyword, and make bid changes in 10 to 15 percent steps rather than large swings that reset the learning.
Once the structure is running, the ongoing work is optimization: harvesting, negatives, bid tuning, and placement adjustments on a fixed schedule. The Amazon PPC optimization routine covers that week-by-week.
Related terms
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Match the strategy to your launch stage
An Amazon account needs a different posture at launch than at maturity, and running the wrong one wastes money.
- At launch, accept a higher ACoS to buy sales velocity and organic rank, since early reviews and best-seller position pay back later
- In the growth stage, hold ACoS below break-even while pushing budget into proven exact-match terms to take share
- At maturity, tighten targets toward pure efficiency on keywords where you already hold organic rank, and let branded defense run cheap
- When you add a new ASIN to an established catalog, treat it as a launch again rather than folding it into mature targets
Reading the stage correctly keeps you from starving a launch or overspending on a product that no longer needs the push.
Use Sponsored Brands and Store traffic to compound
A seller with a catalog gains an edge that a single-product seller cannot: cross-selling inside the brand.
- Point Sponsored Brands headline ads at a Store page or a curated collection so a single click can browse several products
- Track new-to-brand metrics on Sponsored Brands to see which campaigns bring first-time buyers, not just repeat purchasers
- Use Sponsored Display retargeting to recover shoppers who viewed a product page without buying
- Give shoppers a strong Store experience, since a buyer who takes two products is worth far more than the first sale suggests
Brand-level ad types turn a catalog into a funnel instead of a set of isolated listings.
Frequently asked questions
How much should I budget to start Amazon PPC?
Fund enough to gather data, not enough to gamble. For a single product, 20 to 50 dollars per day across an auto and a manual campaign gives Amazon room to collect conversions without draining your account before you learn anything. Expect the first 2 to 4 weeks to run above your target ACoS while the campaigns gather history.
What is a good ACoS target?
It depends on your margin and your goal. A product with 40 percent gross margin breaks even around 40 percent ACoS, so a mature-keyword target of 15 to 25 percent leaves real profit. Products you are launching can run higher on purpose to buy organic rank. There is no universal good number, only a number that fits your economics.
Should I run all three ad types at once?
Not on day one. Start with Sponsored Products, since it drives the majority of most sellers' ad sales and teaches you which keywords convert. Add Sponsored Brands once you have proven terms and a Store to send traffic to, then layer Sponsored Display for retargeting. Adding all three at once makes it hard to tell what is working.
How often should I change bids?
Weekly is enough for most accounts, and change in small steps of 10 to 15 percent. Amazon's auction needs conversion history to settle, and large or frequent bid swings reset that learning. Let each change run 7 to 14 days before judging it, and never react to a single day of data.
Why is my ACoS high even with the right bids?
Usually the listing, not the bid. A page that converts at 6 percent will post double the ACoS of one at 12 percent on the same bid, because the auction rewards conversion. Check the main image, title, price, and review count before blaming the campaign. A weak page raises ACoS no matter how carefully you set bids.
What is keyword harvesting and why does it matter?
Harvesting means moving a search term that converted in an auto or broad campaign into a manual exact campaign, then adding it as a negative where it was found. This stops you paying discovery prices for a known winner and lets you control its bid directly. Run it every 7 to 14 days, since it is the move that compounds ACoS improvement over a quarter.
How do Amazon ads work?
Amazon ads place sponsored products, brands, or display placements in front of shoppers while they search or browse. You pay per click, then judge success by sales, ACoS, total sales lift, and whether ads support organic ranking for the products.
What do Amazon ads do?
In this guide, what do amazon ads do points back to the practical work behind Amazon PPC strategy: what matters, what changes first, and how the result should be measured.
What is the difference between Google ads and Amazon ads?
Choose the option that matches the job. If the decision affects traffic, leads, revenue, or trust, treat it as a question of risk and measurable outcome instead of a preference call.
Where to go next
A clean structure is the foundation, and the ongoing routine keeps ACoS low as sales grow. To understand the core metric behind every bid decision, read what is ACoS, and for the week-by-week routine that maintains the account, see Amazon PPC optimization. When you want a team to build and run the loop for you, our Amazon PPC agency manages the weekly routine.